Functions of Cranial Nerves 1-5: A Neuroanatomy Quiz

1. What is the function of the Olfactory Nerve?

Hearing

Taste

Cranial Nerve (I) Sense of smell.

Sight

The olfactory nerve, also known as Cranial Nerve I, is responsible for the sense of smell. It does not have a role in sight, taste, or hearing.

Explanation

The olfactory nerve, also known as Cranial Nerve I, is responsible for the sense of smell. It does not have a role in sight, taste, or hearing.

2. What is the function of the oculomotor nerve?

Provides sensory innervation to the eye

Innervates the facial muscles

Controls taste sensation

Cranial Nerve (III) motor fibers to the inferior oblique (IO) and superior (SR), Inferior (IR), and medial rectus muscles(MR).

The oculomotor nerve, also known as Cranial Nerve III, controls the movements of certain eye muscles responsible for eye movement.

Explanation

The oculomotor nerve, also known as Cranial Nerve III, controls the movements of certain eye muscles responsible for eye movement.

3. What is the function of the optic nerve?

Cranial Nerve (II) Carries impulses for vision.

Cranial Nerve (V) Carries impulses for taste.

Cranial Nerve (VIII) Carries impulses for balance and hearing.

Cranial Nerve (XII) Carries impulses for motor control of the tongue.

The optic nerve, also known as Cranial Nerve (II), is responsible for carrying impulses related to vision from the eye to the brain. It is not involved in taste, balance, hearing, or motor control of the tongue.

Explanation

The optic nerve, also known as Cranial Nerve (II), is responsible for carrying impulses related to vision from the eye to the brain. It is not involved in taste, balance, hearing, or motor control of the tongue.

4. What is the function of the Trochlear Nerve?

Cranial Nerve (IV) Provides motor fibers to the superior oblique muscle (SO).

Controls the sense of taste on the tongue.

Regulates blood pressure in the body.

Innervates the masseter muscle.

The Trochlear Nerve, also known as Cranial Nerve (IV), provides motor fibers to the superior oblique muscle (SO) which is responsible for one of the movements of the eye.

Explanation

The Trochlear Nerve, also known as Cranial Nerve (IV), provides motor fibers to the superior oblique muscle (SO) which is responsible for one of the movements of the eye.

5. What is the function of the Trigeminal Nerve?

D) None of the above.

B) Regulates blood flow in the cardiovascular system.

A) Conducts visual information from the eyes to the brain.

C) Controls the movement of the fingers and hands.

The Trigeminal Nerve, also known as Cranial Nerve V, is responsible for sensory impulses from the face and scalp, as well as motor functions for chewing muscles. It does not conduct visual information, regulate blood flow, nor control finger and hand movements.

Explanation

The Trigeminal Nerve, also known as Cranial Nerve V, is responsible for sensory impulses from the face and scalp, as well as motor functions for chewing muscles. It does not conduct visual information, regulate blood flow, nor control finger and hand movements.

6. What is the function of the abducens nerve?

Cranial Nerve (VI)Carries motor fibers to the lateral rectus muscle of the eye.

Aids in digestion and nutrient absorption.

Regulates heart rate and blood pressure.

Controls taste perception on the tongue.

The abducens nerve (VI) is responsible for carrying motor fibers to the lateral rectus muscle of the eye, allowing for abduction (outward movement) of the eye. None of the incorrect answers are related to the function of the abducens nerve.

Explanation

The abducens nerve (VI) is responsible for carrying motor fibers to the lateral rectus muscle of the eye, allowing for abduction (outward movement) of the eye. None of the incorrect answers are related to the function of the abducens nerve.

7. What is the primary function of the Facial Nerve?

Breathing regulation

Muscle coordination

Vision control

The Facial Nerve (VII) is primarily responsible for controlling the muscles of facial expression, as well as supplying motor fibers to the lacrimal and salivary glands, and carrying sensory fibers from taste receptors.

Explanation

The Facial Nerve (VII) is primarily responsible for controlling the muscles of facial expression, as well as supplying motor fibers to the lacrimal and salivary glands, and carrying sensory fibers from taste receptors.

8. What is the function of the Vestibulocochlear nerve?

Controls the sense of taste and salivation.

Cranial Nerve (VIII) Transmits impulses for senses equilibrium and hearing.

Regulates blood pressure and heart rate.

Facilitates movement of the eyes and facial expressions.

The correct answer is the function of the Vestibulocochlear nerve is to transmit impulses for senses equilibrium and hearing, as it is Cranial Nerve (VIII).

Explanation

The correct answer is the function of the Vestibulocochlear nerve is to transmit impulses for senses equilibrium and hearing, as it is Cranial Nerve (VIII).

9. What is the function of the Glossopharyngeal Nerve (IX)?

Cranial Nerve (IX) Spit, Swallow and Gag reflex.

Cranial Nerve (V) - Trigeminal Nerve responsible for facial sensation and jaw movement.

Cranial Nerve (X) - Vagus Nerve responsible for various autonomic functions.

Cranial Nerve (VIII) - Vestibulocochlear Nerve responsible for hearing and balance.

The Glossopharyngeal Nerve (IX) is primarily responsible for controlling functions such as spitting, swallowing, and the gag reflex.

Explanation

The Glossopharyngeal Nerve (IX) is primarily responsible for controlling functions such as spitting, swallowing, and the gag reflex.

10. What is the function of the Vagus Nerve?

A nerve responsible for controlling the skeletal muscles

A nerve responsible for smell perception

A nerve responsible for regulating heartbeat and digestion

A nerve responsible for vision

The Vagus Nerve, also known as Cranial Nerve X, is responsible for motor and sensory function in the pharynx and larynx, as well as supplying parasympathetic motor fibers to the heart and smooth muscles of the abdominal and visceral organs.

Explanation

The Vagus Nerve, also known as Cranial Nerve X, is responsible for motor and sensory function in the pharynx and larynx, as well as supplying parasympathetic motor fibers to the heart and smooth muscles of the abdominal and visceral organs.

11. What is the function of the Accessory Nerve?

Cranial Nerve (XI) Provides motor fibers to the Sternocleidomastoid and Trapezius muscle

Cranial Nerve (VII) Controls facial expression muscles and carries taste sensations from the tongue.

Cranial Nerve (V) Sensory fibers for the face and motor fibers for chewing muscles.

The Accessory Nerve, also known as Cranial Nerve XI, provides motor fibers to the Sternocleidomastoid and Trapezius muscle. It is not responsible for sensory functions or taste sensations in the face or tongue.

Explanation

The Accessory Nerve, also known as Cranial Nerve XI, provides motor fibers to the Sternocleidomastoid and Trapezius muscle. It is not responsible for sensory functions or taste sensations in the face or tongue.

12. What is the function of the Hypoglossal Nerve?

Cranial Nerve (V) Motor fibers serve the muscles of mastication and sensory fibers carry impulses from the jaw.

Cranial Nerve (XII) Motor fibers serve the muscles of the tongue and sensory fibers carry impulses from the tongue.

Cranial Nerve (X) Motor fibers serve the muscles of the pharynx and sensory fibers carry impulses from the throat.

Cranial Nerve (VII) Motor fibers serve the muscles of facial expression and sensory fibers carry impulses from the face.

The Hypoglossal Nerve, or Cranial Nerve (XII), plays a key role in controlling the muscles of the tongue and carrying sensory impulses from the tongue. It is essential for functions such as speech, swallowing, and taste perception.

Explanation

The Hypoglossal Nerve, or Cranial Nerve (XII), plays a key role in controlling the muscles of the tongue and carrying sensory impulses from the tongue. It is essential for functions such as speech, swallowing, and taste perception.