Innervation Quiz Upper & Lower Extremity

The extensor carpi radialis brevis is innervated by the radial nerve. The radial nerve is responsible for providing motor innervation to the muscles of the posterior compartment of the forearm, including the extensor carpi radialis brevis. This muscle is involved in extending and abducting the wrist. Therefore, the correct answer is the radial nerve.

The radial nerve is responsible for innervating the extensor digitorum muscle. This muscle is located in the forearm and is responsible for extending the fingers. The radial nerve originates from the brachial plexus and travels down the arm, supplying motor and sensory innervation to various muscles and areas of the arm. Therefore, the radial nerve is the correct answer in this context.

The extensor pollicis longus is innervated by the radial nerve. The radial nerve is responsible for providing motor innervation to the muscles of the posterior compartment of the forearm, including the extensor muscles. The extensor pollicis longus is a muscle located in the forearm that extends the thumb. Therefore, it makes sense that it would be innervated by the radial nerve, which controls the extensor muscles of the forearm.

The radial nerve is responsible for innervating the triceps brachii muscle, specifically the long head. This nerve originates from the brachial plexus and runs along the posterior aspect of the arm. It provides motor function to the triceps brachii, allowing for extension of the elbow joint. The other nerves listed are not directly associated with innervating the triceps brachii muscle.

The obturator nerve is the correct answer because it innervates the obturator externus muscle. The obturator nerve arises from the lumbar plexus and travels through the obturator foramen to reach the medial compartment of the thigh. It provides motor innervation to the obturator externus muscle, which is responsible for lateral rotation and stabilization of the hip joint. Therefore, the obturator nerve is the most appropriate option among the given choices.

The radial nerve is responsible for innervating the triceps brachii muscle, specifically the lateral head. The triceps brachii is a muscle located at the back of the upper arm and is responsible for extending the elbow joint. The radial nerve supplies the necessary motor signals to the triceps brachii to carry out this function. Therefore, the radial nerve is the correct answer in this case.

The correct answer is the Musculocutaneous Nerve. The Musculocutaneous Nerve is responsible for providing motor innervation to the muscles of the anterior compartment of the arm, including the Coracobrachialis muscle. It also provides sensory innervation to the lateral forearm. Therefore, the Musculocutaneous Nerve is the nerve that innervates the Coracobrachialis muscle.

The musculocutaneous nerve is responsible for innervating the brachialis muscle. It originates from the lateral cord of the brachial plexus and provides motor innervation to the muscles of the anterior compartment of the arm, including the brachialis. Additionally, it also provides sensory innervation to the lateral aspect of the forearm through its cutaneous branches. Therefore, the musculocutaneous nerve is the correct answer in this context.

The femoral nerve is the correct answer because it innervates the rectus femoris muscle. The rectus femoris is one of the four quadriceps muscles located in the front of the thigh. It is responsible for extending the leg at the knee joint. The femoral nerve originates from the lumbar plexus and supplies motor and sensory innervation to the muscles and skin of the anterior thigh and medial leg. Therefore, the femoral nerve is directly involved in the function of the rectus femoris muscle.

The extensor carpi ulnaris is a muscle located in the forearm that is responsible for extending and adducting the wrist. It is innervated by the radial nerve, which is one of the main nerves of the arm. The radial nerve supplies the extensor muscles of the forearm, including the extensor carpi ulnaris, allowing them to contract and perform their functions. Therefore, the correct answer is radial.

The radial nerve innervates the extensor pollicis brevis muscle. This muscle is located in the forearm and is responsible for extending the thumb. The other nerves listed do not innervate this specific muscle.

The radial nerve is responsible for innervating the extensor indicis muscle. This muscle is located in the forearm and is responsible for extending the index finger. The radial nerve originates from the brachial plexus and runs down the arm, supplying sensation and motor function to various muscles in the forearm and hand. Therefore, the radial nerve is the correct answer for the given question.

The correct answer is Radial Nerve. The triceps brachii muscle is innervated by the radial nerve. This nerve is responsible for supplying the posterior compartment of the arm, including the triceps muscle. It is the largest branch of the brachial plexus and controls the extension of the elbow joint.

The deep peroneal nerve is responsible for innervating the peroneus tertius muscle. This muscle is located in the anterior compartment of the leg and assists in dorsiflexion and eversion of the foot. The deep peroneal nerve also innervates other muscles in the anterior compartment and provides sensory innervation to the skin between the first and second toes. Therefore, the deep peroneal nerve is the most appropriate answer in this context.

The flexor pollicis longus is innervated by the median nerve. The median nerve is responsible for supplying motor innervation to the flexor pollicis longus muscle, which is located in the forearm and is responsible for flexing the thumb. The other nerves listed in the options do not innervate the flexor pollicis longus muscle.

The ulnar nerve innervates the 3rd and 4th lumbrical muscles. The lumbricals are small muscles in the hand that help with finger flexion and extension. The ulnar nerve is responsible for providing motor innervation to these muscles. It travels along the ulnar side of the forearm and passes through the Guyon's canal to reach the hand. Damage or compression of the ulnar nerve can result in weakness or loss of function in the 3rd and 4th lumbricals, leading to impaired finger movements.

The median nerve is the correct answer because it is responsible for innervating the thenar eminence. The thenar eminence is a muscle group located at the base of the thumb and is responsible for the movement and control of the thumb. The median nerve also innervates other muscles in the forearm and hand, providing sensation and motor function to these areas.

The radial nerve is responsible for the supination of the forearm. It innervates the supinator muscle, which is responsible for rotating the forearm outward. The other nerves listed do not have a direct role in supination. The ulnar nerve innervates muscles in the hand, the median nerve innervates muscles in the forearm and hand, the axillary nerve innervates the deltoid muscle, and the spinal accessory nerve innervates the trapezius muscle. The musculocutaneous nerve innervates the biceps brachii muscle.

The pronator teres muscle is innervated by the median nerve. The median nerve is responsible for providing sensory and motor innervation to the muscles in the forearm, including the pronator teres. It also supplies sensation to the palm, thumb, index, middle, and half of the ring fingers.

The correct answer is the Ulnar Nerve. The Flexor Digitorum Profundus is innervated by the ulnar nerve. This nerve originates from the brachial plexus and supplies motor and sensory innervation to the ulnar side of the forearm and hand. The Flexor Digitorum Profundus is responsible for flexing the distal interphalangeal joints of the fingers.

The ulnar nerve is responsible for innervating the muscles of the hypothenar eminence, which is a muscular prominence located on the palm of the hand, near the base of the little finger. This nerve also provides sensation to the little finger and part of the ring finger. Therefore, the ulnar nerve is the correct answer because it is directly related to the hypothenar eminence.

The ulnar nerve innervates the abductor digiti minimi muscle. This muscle is responsible for the abduction of the little finger, which means it moves the little finger away from the other fingers. The ulnar nerve is one of the major nerves in the upper limb and it supplies sensation to the little finger and half of the ring finger. It also controls the muscles of the hand that are responsible for fine motor movements. Therefore, it makes sense that the ulnar nerve would be the correct answer for the innervation of the abductor digiti minimi muscle.

The axillary nerve is the correct answer because it is one of the nerves that innervates the deltoid muscle. The deltoid muscle is located in the shoulder and is responsible for abducting the arm. The axillary nerve originates from the brachial plexus and supplies motor innervation to the deltoid muscle, as well as sensory innervation to the skin over the deltoid muscle. Therefore, damage to the axillary nerve can result in weakness or paralysis of the deltoid muscle, leading to difficulty in raising the arm.

The median nerve is responsible for innervating the flexor carpi radialis muscle. This muscle is located in the forearm and is responsible for flexing the wrist. The median nerve originates from the brachial plexus and travels down the arm, supplying sensation and motor function to the hand and forearm. It is one of the major nerves in the upper limb and plays a crucial role in hand movements and dexterity.

The correct answer is Median Nerve. The flexor digitorum superficialis is innervated by the median nerve. This muscle is responsible for flexing the fingers at the proximal interphalangeal joints. The median nerve originates from the brachial plexus and supplies motor innervation to several muscles in the forearm, including the flexor digitorum superficialis.

The radial nerve is responsible for the innervation of the anconeous muscle. The anconeous muscle is located in the posterior compartment of the arm and assists in extension of the forearm at the elbow joint. The radial nerve travels along the back of the arm and provides motor and sensory innervation to various muscles and areas of the arm, forearm, and hand. Therefore, it makes sense that the radial nerve would be the correct answer for the innervation of the anconeous muscle.

The deep peroneal nerve is responsible for innervating the extensor hallicis brevis muscle. This muscle is located in the foot and is responsible for extending the big toe. The deep peroneal nerve is a branch of the common peroneal nerve and it supplies motor innervation to the muscles in the anterior compartment of the leg and the dorsum of the foot. It also provides sensory innervation to the skin between the first and second toes. Therefore, the deep peroneal nerve is the correct answer in this case.

The deep peroneal nerve is responsible for innervating the extensor digitorum brevis muscle. This muscle is located in the foot and is involved in extending the toes. The deep peroneal nerve originates from the common peroneal nerve and provides motor innervation to the muscles on the anterior compartment of the leg and the dorsum of the foot. It also provides sensory innervation to the skin between the first and second toes. Therefore, the deep peroneal nerve is the correct answer in this case.

The correct answer is Tibial Nerve because the Flexor Digitorium Longus muscle is innervated by the Tibial Nerve. The Tibial Nerve is a branch of the Sciatic Nerve and it supplies motor innervation to the muscles of the posterior compartment of the leg, including the Flexor Digitorium Longus. This muscle plays a role in flexing the toes and is responsible for curling the toes downwards. Therefore, the Tibial Nerve is the correct answer as it innervates the Flexor Digitorium Longus muscle.

The median nerve is responsible for innervating the opponens pollicis muscle. The opponens pollicis is a muscle in the hand that allows for opposition of the thumb, which is the movement that allows us to touch the thumb to the other fingers. The median nerve is one of the major nerves in the upper limb and provides sensory and motor innervation to the muscles of the forearm and hand.

The median nerve innervates the 1st and 2nd lumbricals. The lumbricals are intrinsic hand muscles that flex the metacarpophalangeal joints and extend the interphalangeal joints. The median nerve originates from the brachial plexus and supplies motor and sensory innervation to the forearm and hand. It passes through the carpal tunnel and can be compressed in conditions such as carpal tunnel syndrome, leading to symptoms like hand weakness and numbness.

The musculocutaneous nerve is responsible for innervating the biceps brachii muscle. This nerve originates from the brachial plexus and provides motor function to the muscles in the anterior compartment of the arm. It also provides sensory innervation to the lateral aspect of the forearm. Therefore, the musculocutaneous nerve is the correct answer in this case.

The ulnar nerve is responsible for innervating the flexor carpi ulnaris muscle. This muscle is located in the forearm and is responsible for flexing the wrist. The ulnar nerve originates from the brachial plexus in the neck and travels down the arm to innervate various muscles and provide sensation to the hand. In this case, it specifically innervates the flexor carpi ulnaris muscle, allowing it to contract and perform its function of flexing the wrist.

The ulnar nerve is the correct answer because the opponens digiti minimi is innervated by the ulnar nerve. The opponens digiti minimi is a muscle located in the hand that helps with opposition and flexion of the little finger. The ulnar nerve is responsible for supplying motor and sensory innervation to the hand, specifically the little finger and half of the ring finger. Therefore, it is the nerve that controls the opponens digiti minimi muscle.

The axillary nerve is responsible for innervating the teres minor muscle, which is one of the muscles in the rotator cuff of the shoulder. The axillary nerve also innervates the deltoid muscle, which is responsible for shoulder abduction. Therefore, the axillary nerve is the correct answer as it is directly related to the teres minor muscle.

The obturator nerve is the correct answer because it innervates the adductor brevis muscle. The adductor brevis is located in the inner thigh and is responsible for adducting the hip joint, meaning it helps bring the leg towards the midline of the body. The obturator nerve originates from the lumbar plexus and travels through the obturator foramen to reach the adductor muscles of the thigh. It provides both sensory and motor innervation to the adductor brevis, allowing it to contract and perform its function.

The median nerve is the correct answer because it is one of the major nerves in the upper limb. It innervates several muscles in the forearm and hand, including the flexor muscles of the wrist and fingers. It also provides sensory innervation to the palm and fingers. The other nerves listed are also important nerves in the upper limb, but they do not have the same functions as the median nerve.

The radial nerve is responsible for innervating the extensor carpi radialis longus muscle. This muscle is located in the forearm and is responsible for extending and abducting the wrist. The radial nerve originates from the brachial plexus and travels down the arm, providing motor and sensory innervation to various muscles and areas of the arm and hand. Therefore, the radial nerve is the correct answer in this case.

The tibial nerve is the correct answer because it is responsible for innervating the plantaris muscle. The plantaris muscle is a small muscle located in the posterior compartment of the leg, and it assists in plantar flexion of the foot and flexion of the knee. The tibial nerve is a branch of the sciatic nerve, and it supplies motor and sensory innervation to the posterior compartment of the leg and the sole of the foot. The obturator nerve supplies motor innervation to the medial compartment of the thigh, while the femoral nerve innervates the anterior compartment of the thigh.

The deep peroneal nerve is responsible for innervating the extensor hallucis longus muscle. This muscle is located in the anterior compartment of the leg and is responsible for extending the big toe. The deep peroneal nerve originates from the common peroneal nerve and provides motor innervation to the muscles in the anterior compartment of the leg. Therefore, it is the correct answer in this case.

The extensor digiti minimi is a muscle located in the forearm that is responsible for extending the little finger. The radial nerve is the correct answer because it innervates this muscle, meaning it provides the necessary nerve signals for the muscle to contract and perform its function. The other nerves listed do not innervate the extensor digiti minimi muscle.

The sternocleidomastoid muscle is innervated by the spinal accessory nerve. This nerve originates from the brainstem and travels through the neck to supply motor innervation to the sternocleidomastoid and trapezius muscles. The other nerves listed, such as the median, radial, ulnar, axillary, and musculocutaneous nerves, do not innervate the sternocleidomastoid muscle. Therefore, the correct answer is the spinal accessory nerve.

The obturator nerve is the correct answer because it innervates the adductor longus muscle. The adductor longus muscle is located in the inner thigh and is responsible for adducting the thigh, or bringing it closer to the midline of the body. The obturator nerve originates from the lumbar plexus and provides motor and sensory innervation to the muscles and skin of the medial thigh. It also plays a role in hip joint stability. The other nerves listed do not directly innervate the adductor longus muscle.

The superficial peroneal nerve is responsible for innervating the peroneus longus muscle. This nerve originates from the common peroneal nerve, which is a branch of the sciatic nerve. The peroneus longus muscle is located in the lateral compartment of the leg and is responsible for plantar flexion and eversion of the foot. The superficial peroneal nerve supplies motor innervation to this muscle, allowing it to perform these actions. Therefore, the superficial peroneal nerve is the correct answer in this case.

The spinal accessory nerve is responsible for innervating the trapezius muscle. This nerve controls the movement of the trapezius muscle, which is located in the upper back and neck. The trapezius muscle is important for various movements of the shoulder, such as shrugging, rotating, and retracting the scapula. Therefore, the spinal accessory nerve is the correct answer as it directly relates to the innervation of the trapezius muscle.

The obturator nerve is responsible for innervating the muscles of the medial thigh, including the gracilis muscle. The gracilis muscle is one of the adductor muscles of the thigh, which helps to bring the thigh towards the midline of the body. Since the obturator nerve innervates the gracilis muscle, it is the correct answer in this case. The other nerves listed do not directly innervate the gracilis muscle.

The flexor digitorum profundus muscle is innervated by the median nerve. The median nerve is responsible for providing motor innervation to the flexor muscles of the forearm, including the flexor digitorum profundus. It originates from the brachial plexus, passes through the arm, and supplies sensation to the hand. The other nerves listed, such as the radial, ulnar, axillary, spinal accessory, and musculocutaneous nerves, do not innervate the flexor digitorum profundus muscle.

The median nerve is responsible for innervating the pronator quadratus muscle. The pronator quadratus is a deep muscle of the forearm that plays a key role in pronation of the forearm. When the median nerve is damaged or compressed, it can result in weakness or paralysis of the pronator quadratus muscle, leading to difficulty in pronating the forearm. Therefore, the correct answer is Median Nerve.

The correct answer is the Median Nerve. The abductor pollicis brevis is a muscle located in the hand that is responsible for abducting the thumb. The median nerve innervates this muscle, along with several other muscles in the forearm and hand. It is one of the major nerves in the upper limb and provides motor and sensory innervation to various muscles and areas of the hand.

The flexor hallucis longus is a muscle responsible for flexing the big toe. It is innervated by the tibial nerve, which is a branch of the sciatic nerve. The tibial nerve provides motor innervation to the muscles of the posterior compartment of the leg, including the flexor hallucis longus. Therefore, the correct answer is the tibial nerve.