Muscles Of Head And Neck

The correct answer is Temporalis. Temporalis is the name of the muscle "A".

The sternocleidomastoid muscle is responsible for rotating and extending the head. It is a long muscle that runs from the sternum and clavicle to the mastoid process of the temporal bone. When contracted, it allows for rotation of the head to the opposite side and extension of the head backwards.

The pterygoids are indeed divided into lateral and medial. The pterygoid muscles are located in the skull and play a role in jaw movement. The lateral pterygoid muscle is responsible for moving the jaw forward and side to side, while the medial pterygoid muscle helps with jaw closure and chewing. Therefore, the statement is true.

The origin of the temporalis muscle is the temporal aspect of the skull. This means that the muscle originates from the temporal bone, which is located on the side of the skull. The temporalis muscle is responsible for the movement of the jaw, specifically in closing the jaw during chewing.

The occipitofrontalis muscle is not inserted in the lower lip near the angle. It is a muscle located in the scalp, and its insertion points are the skin of the eyebrows and the frontal bone of the skull. Therefore, the statement is false.

The depressor angulioris is a muscle that is responsible for depressing the angle of the mouth. This means that it pulls the corners of the mouth downward, causing a frowning or sad expression. It is an important muscle involved in facial expressions and is activated when a person is feeling unhappy or expressing negative emotions.

The muscle that draws the lips together around the mouth is the orbicularis oris. This muscle is responsible for closing and puckering the lips, as well as controlling the movements of the lips during speech and facial expressions. It is a circular muscle that surrounds the mouth and is essential for activities such as kissing, whistling, and blowing.

The insertion of the trapezius muscle is the scapula. The trapezius muscle is a large muscle located on the upper back and neck. It originates from the occipital bone and the spinous processes of the cervical and thoracic vertebrae. It then inserts onto the lateral third of the clavicle, acromion, and spine of the scapula. This muscle is responsible for movements such as shoulder elevation, retraction, and rotation.

The correct answer is Occipitofrontalis.

The occipitofrontalis muscle originates from the occipital bone.

The action of the orbicularis oculi muscle is to close the eye. This muscle is responsible for bringing the eyelids together, allowing the eye to close and protecting it from external stimuli.

The action of the Orbicularis oculi is to close the eye. This muscle is responsible for blinking and closing the eyelids, which helps protect the eye from foreign objects and moisture.

The Buccinator muscle is responsible for compressing the cheeks. This action is important for activities such as blowing, sucking, and chewing. When the Buccinator muscle contracts, it narrows the space inside the oral cavity, helping to keep food or liquid in the mouth and assisting in the process of swallowing. Additionally, it plays a role in producing certain sounds during speech, particularly those involving air flow through the cheeks.

The trapezius muscles are responsible for extending the head and neck. These muscles are located on the upper back and neck and play a crucial role in various movements of the head and neck, including tilting the head backward, rotating the head, and extending the neck. They are important for maintaining good posture and providing stability and strength to the upper body.

The orbicularis oculi is a muscle that encircles the eye, near its origin. This muscle is responsible for closing the eyelids and is involved in facial expressions such as blinking and squinting.

The action of the Pterygoids muscle is to close the jaw medially and open the jaw laterally. This means that the muscle helps in moving the jaw from side to side and is involved in chewing and grinding food.

The correct answer is Orbicularis oris. In the image of Jim Carrey moving his lips, the muscle that is observed is the orbicularis oris. This muscle is responsible for closing and puckering the lips, which is evident in the movement of Carrey's lips in the image. The other options, such as occipitofrontalis, orbicularis oculi, and temporalis, are not relevant to the movement of the lips and are not observed in the image.

The insertion "extends head and neck" is not associated with the temporalis muscle. The temporalis muscle is responsible for elevating and retracting the mandible, but it does not extend the head and neck. Therefore, the statement is false.

The zygomaticus major muscle originates from the zygomatic bone.

The sternocleidomastoid muscle originates from the sternum and clavicle.

The muscle that depresses the angle of the mouth is the Depressor Angulioris. This muscle is responsible for pulling down the corners of the mouth, creating a frowning or sad expression. It works in opposition to the muscles that elevate the angle of the mouth, such as the Levator labii Superioris. The Buccinator muscle is involved in compressing the cheeks, while the Orbicularis oris is responsible for closing and puckering the lips.

The action of the Levator Labii Superioris muscle is to elevate the upper lip and nose. This muscle is responsible for lifting the upper lip and flaring the nostrils, which is essential for various facial expressions such as sneering or expressing disgust.

The action of the Zygomaticus is to elevate the angle of the mouth and the upper lip. This muscle is responsible for smiling and expressing happiness. When the Zygomaticus contracts, it pulls the corners of the mouth upward, creating a smile and lifting the upper lip slightly.

The correct answer is "Undersurface of skull." The pterygoid muscles, both lateral and medial, originate from the undersurface of the skull. These muscles are located in the region of the sphenoid bone and play a crucial role in jaw movement and chewing.

The trapezius muscle originates from the skull and the upper vertebral column. It is a large muscle that extends down the back of the neck and upper spine. It helps to move and stabilize the shoulder blades and neck.

The depressor angulioris muscle originates from the mandible.

The sternocleidomastoid muscle is responsible for rotating and extending the head. It is a large muscle located in the neck, and when it contracts, it helps to turn the head to the opposite side and also helps in tilting the head backward. This muscle plays a crucial role in various movements of the head and neck, including rotation and extension.

The temporalis muscle is responsible for closing the jaw. It is one of the main muscles involved in the process of chewing and is located on the side of the head. When the temporalis muscle contracts, it pulls the lower jaw upward, causing the mouth to close. This action is essential for biting, chewing, and speaking.

The masseter muscle is responsible for closing the jaw. It is one of the main muscles involved in the process of chewing and biting. When the masseter muscle contracts, it causes the jaw to move upwards and close, allowing for the grinding and breaking down of food. Therefore, the correct answer is "Closes jaw".

The orbicularis oris muscle originates from the maxilla and mandible. This muscle is responsible for the movements of the lips, such as closing and puckering. The maxilla is the upper jawbone, while the mandible is the lower jawbone. Both of these structures play a crucial role in the formation and function of the orbicularis oris muscle.

The insertion of the masseter muscle is the mandible. The masseter muscle is one of the main muscles involved in chewing and is responsible for closing the jaw. It originates from the zygomatic arch and inserts onto the mandible, allowing it to exert force and move the mandible during the process of chewing.

The statement is false because there are actually two pterygoid muscles, not four. The pterygoid muscles are located in the skull and they have their origin on the inferior aspect of the skull.

The orbicularis oculi muscle is a muscle responsible for closing the eyelids. It is located around the eye socket and is attached to the maxilla and frontal bones of the skull. This muscle helps protect the eye from foreign objects and also plays a role in facial expressions such as blinking and squinting. The origin of the orbicularis oculi muscle being the maxilla and frontal bones is supported by anatomical studies and observations.

The buccinator muscle is a facial muscle that is responsible for compressing the cheeks against the teeth and gums. It helps with actions such as blowing, whistling, and sucking. The correct answer, "Maxilla, mandible," refers to the origin of the buccinator muscle. The muscle originates from the maxilla (upper jawbone) and the mandible (lower jawbone). This means that it attaches to these bones and originates from them, allowing it to perform its functions of compressing the cheeks.

The occipitofrontalis muscle is responsible for elevating the brows. When this muscle contracts, it pulls the scalp forward, causing the eyebrows to move upward. This action is commonly associated with expressions of surprise or curiosity.

The mastoid process is not the origin of the sternocleidomastoid muscle. The sternocleidomastoid muscle originates from the sternum and the clavicle, not the mastoid process.

The origin of the masseter muscle is the zygomatic arch. The masseter muscle is one of the main muscles involved in chewing and is responsible for closing the jaw. It originates from the zygomatic arch, which is a bony structure on the side of the skull that connects the temporal bone to the maxilla. This origin allows the masseter muscle to exert force on the mandible (jawbone) during chewing and biting movements.

The muscle that has its origin on the temporal aspect of the skull and its insertion on the mandible is called the temporalis. The temporalis muscle is one of the muscles responsible for the movement of the jaw, specifically for closing the jaw during chewing and biting.

The zygomaticus muscle is located in the face and is responsible for lifting the corners of the mouth during smiling. Its insertion refers to the point where the muscle attaches to the bone or other structures. In this case, the correct answer states that the insertion of the zygomaticus is at the angle of the mouth and upper lip, indicating that it connects to these areas to allow for movement and expression.

The origin of the Pterygoids (lateral and medial) muscles is the undersurface of the skull.

The correct answer is "Lower lip near angle". The depressor angulioris is a muscle that is located near the angle of the mouth. It is responsible for pulling the lower lip downwards and towards the side.

The semispinalis capitis is a muscle located in the back of the head and neck. Its function is to extend the head, meaning it helps to bring the head into an upright position. Additionally, it also plays a role in bending the head laterally, which means it helps to tilt the head sideways. Therefore, the correct answer is "Extends head; bends it laterally."

The mandible is the bone that forms the lower jaw. There are three muscles that have their insertion on the mandible. These muscles are the masseter, temporalis, and medial pterygoid muscles. The masseter muscle is responsible for elevating the mandible during chewing, the temporalis muscle helps in closing the jaw, and the medial pterygoid muscle aids in chewing and moving the jaw from side to side. Therefore, the correct answer is 3.

The levator labii superioris muscle originates from the maxilla.

The insertion of the levator labii superioris is in the upper lip and nose. This muscle is responsible for raising the upper lip and dilating the nostrils.

The correct answer is Mandible (medial surface). The insertion of the Pterygoids muscles is on the medial surface of the mandible.

The orbicularis oris is a muscle that encircles the lips. It is responsible for controlling the movements of the lips, such as closing and puckering. Therefore, the correct answer is "Lips."

The buccinator muscle is located in the cheek region and is responsible for compressing the cheeks inward during activities such as blowing or sucking. The angle of the mouth is the correct insertion point for the buccinator muscle, as it attaches to the corners of the mouth. This allows the muscle to aid in various functions such as smiling and chewing. The other options, such as encircling the eye or attaching to the upper lip or nose, are incorrect as they do not correspond to the actual insertion point of the buccinator muscle.

The insertion of the temporalis muscle is the mandible. This means that the muscle attaches to the mandible bone. The temporalis muscle is one of the muscles responsible for closing the jaw and is located on the side of the head. Its insertion on the mandible allows it to exert force and control movements of the jaw.

The function of the Pterygoids (lateral and medial) muscles is to grate teeth. These muscles are responsible for the side-to-side movement of the jaw, which is necessary for grinding and chewing food. By contracting and relaxing, the Pterygoids help to create the grinding motion that allows teeth to grate against each other, aiding in the breakdown of food particles during the chewing process.