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Questions and Answers
What muscle is the arrow labelled A pointing to?
What muscle is the arrow labelled A pointing to?
- Sternocleidomastoid
- Trapezius
- Masseter (correct)
- Temporalis
Which area is the arrow labelled B pointing to?
Which area is the arrow labelled B pointing to?
- Base of the jaw (correct)
- Top of the skull
- Chest
- Shoulder
Which muscle is primarily responsible for chewing and is pointed to by the arrow labelled A?
Which muscle is primarily responsible for chewing and is pointed to by the arrow labelled A?
- Masseter (correct)
- Pectoralis major
- Latissimus dorsi
- Deltoid
Which anatomical feature associated with the jaw is the arrow labelled B indicating?
Which anatomical feature associated with the jaw is the arrow labelled B indicating?
Which muscle, used in mastication, is labelled A in the diagram?
Which muscle, used in mastication, is labelled A in the diagram?
Which muscle is indicated by 'A'?
Which muscle is indicated by 'A'?
Where does the action 'lateral flexion and rotation of the head to the same side' occur?
Where does the action 'lateral flexion and rotation of the head to the same side' occur?
Which muscle is labeled as number 5?
Which muscle is labeled as number 5?
Which muscle is responsible for aiding in swallowing by elevating the hyoid bone?
Which muscle is responsible for aiding in swallowing by elevating the hyoid bone?
Which muscle is located closest to the anterior scalene?
Which muscle is located closest to the anterior scalene?
Which muscle is labeled A in the image?
Which muscle is labeled A in the image?
Which function is primarily performed by the muscle labeled A?
Which function is primarily performed by the muscle labeled A?
Which muscle is labeled B in the image?
Which muscle is labeled B in the image?
What is the primary function of the muscle labeled B?
What is the primary function of the muscle labeled B?
Which muscle is labeled as 'A' in the image?
Which muscle is labeled as 'A' in the image?
Where is the sternocleidomastoid muscle located?
Where is the sternocleidomastoid muscle located?
Which muscle is labeled as 'B' in the image?
Which muscle is labeled as 'B' in the image?
What is the primary function of the muscle labeled 'A'?
What is the primary function of the muscle labeled 'A'?
Which muscle assists in shrugging the shoulders?
Which muscle assists in shrugging the shoulders?
Which muscle is prominently involved in facial expressions but is not labeled in the image?
Which muscle is prominently involved in facial expressions but is not labeled in the image?
Which action is performed by the muscle labeled 'A'?
Which action is performed by the muscle labeled 'A'?
What is the action of the muscle labeled 'B'?
What is the action of the muscle labeled 'B'?
Which of the following is NOT an action performed by the muscles in the neck region?
Which of the following is NOT an action performed by the muscles in the neck region?
Which muscle action is associated with the movement of the scapula?
Which muscle action is associated with the movement of the scapula?
Which action focuses on the head's movement?
Which action focuses on the head's movement?
What is the action of muscle 'A'?
What is the action of muscle 'A'?
Which muscle is indicated by 'B'?
Which muscle is indicated by 'B'?
Which muscle depresses the mandible?
Which muscle depresses the mandible?
Which of the following actions is NOT performed by the sternohyoid muscle?
Which of the following actions is NOT performed by the sternohyoid muscle?
Which muscle flexes the neck?
Which muscle flexes the neck?
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Study Notes
Muscle Anatomy of the Neck
- The anterior scalene muscle is labeled as 1.
- The anterior belly of the digastric muscle is labeled as 2.
- The thyrohyoid muscle is labeled as 3.
- The superior belly of the omohyoid muscle is labeled as 4.
- The sternocleidomastoid muscle is labeled as 5.
- The sternohyoid muscle is labeled as 6.
Muscle Identification
- The muscle indicated by "A" is the anterior belly of the digastric.
- The action of the muscle indicated by "A" is to elevate the hyoid bone during deglutition.
- The muscle indicated by "B" is the sternohyoid.
- The action of the muscle indicated by "B" is lateral flexion and rotation of the head to the same side.
Muscle Actions
- Elevates the lateral commissure of the lips (action of the anterior belly of the digastric).
- Laterally flexes and rotates the head to the same side (action of the sternohyoid).
- Elevates the hyoid bone (action of the anterior belly of the digastric).
- Depresses the hyoid bone and larynx (action of the sternohyoid).
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