Term
| Originate on the skull and insert on the dermis of the face. |
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Definition
| What is the anatomical location of the origin and insertion of the muscles that control facial expression? |
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Term
| The orbicularis oris closes/puckers the lips; the buccinator compresses the cheeks to move food back over the teeth and aid in suction. |
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Definition
| What two muscles control the mouth? |
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Term
| The axial muscles position the head and the spinal column; they also function to move the rib cage to aid in respiration/ventilation (breathing). |
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Definition
| What are the two functions of the axial muscles? The axial muscles comprise what percentage of the total muscles in the human body? |
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Term
| The frontalis raises the eyebrows and wrinkles the forehead; the occipitalis tenses the scalp. |
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Definition
| What muscles are involved in movement of the scalp? What is their effect upon constraction/relaxation? |
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Term
| The orbicularis oculi closes the eye; the levator palpebrae superioris elevates the upper eye lid. |
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Definition
| What two muscles result in action related to the eye? What specific action is the result of each upon contraction/relaxation? |
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Term
| The platysma tenses the skin of the neck and depresses the mandible. |
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Definition
| What muscle is located in the neck and what actions are the result of the contraction of this muscle? |
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Term
| The extrinsic eye muscles originate on the surface of the orbit and insert on the sclera (surface of the eyeball); there are two groups--the 'rectus' group (4 muscles) and the 'oblique' group (2 muscles), which gives a total of six extrinsic eye muscles. |
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Definition
| What is the anatomical location of the origin and insertion of the extrinsic eye muscles? How many are there and how are they categorized (include the number in each category). |
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Term
| The three muscles involved with mastication are the masseter, temporalis, and pterygoids; the term 'mastication' is defined as 'chewing.' |
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Definition
| What muscles are in the group of muscles responsible for mastication? What is mastication? |
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Term
| The masseter muscle is the main muscle in the group of muscles responsible for mastication; it elevates the mandible and closes the jaw. |
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Definition
| What action(s) are the result of the contraction of the masseter muscle? |
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Term
| The temporalis muscle assists the masseter muscle in the elevation of the jaw. |
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Definition
| What action occurs with the contraction of the temporalis muscle? |
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Term
| The medial pterygoid elevates the mandible and closes the lower jaw (clenches the teeth) and can protrude the mandible in combination with the lateral pterygoid--which closes the mandible (superior head), opens the mouth by protruding mandible (inferior head) and deviates mandible to side opposite of contraction during chewing). |
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Definition
| List the two pterygoid muscles, as well as the action(s) resulting in their contraction? |
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Term
| The lateral rectus abducts the eye. |
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Definition
| What is the action of the lateral rectus (extraocular muscle)? |
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Term
| The medial rectus adducts the eye. |
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Definition
| What is the action of the medial rectus (extraocular musculature)? |
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Term
| The superior rectus causes the eye to look up. |
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Definition
| What is the action of the superior rectus (extraocular muscularature)? |
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