Muscles of the Head and Neck Flashcards

(32 cards)

1
Q

Platysma

A

Tenses neck and depresses (lowers) mandible (jaw)
- Innervated by CN 7 (eyebrows, nose, lips, facial expression)

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2
Q

Frontalis

A

Raises Eyebrow

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3
Q

Orbicularis Oris

A

Purses lips

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4
Q

Zygomaticus Major

A

Raises corners of lips

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5
Q

Buccinator

A

Compresses cheeks

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6
Q

Depressor anguli oris

A

Lowers corners of lips

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7
Q

Occipitalis

A

Tenses scalp

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8
Q

Orbicularis oculi

A

Closes eyelids

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9
Q

Masticate

A

Chewing (movements of the mandible_)

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10
Q

Pterygoid Muscles

A

Deep surface of the muscles and attach to pterygoid process of sphenoid

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11
Q

Masseter

A

Elevates mandible

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12
Q

Temporalis

A

Elevates mandible

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13
Q

Medial Pterygoid

A

Elevates jaw, moves jaw medially

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14
Q

Lateral Pterygoid

A

Protrudes the lower jaw

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15
Q

Extraocular Muscles

A

Innervated by CN 3,4,6
- Superior, inferior, lateral, and medial recuses are 90 degrees from each other
- Superior oblique, Inferior Oblique

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16
Q

Rectus

A

Straight path from a common origin in the back of the orbit to the eyeball

17
Q

Meidal rectus

A

Turns eye medially

18
Q

Lateral rectus

A

Turns eye laterally

19
Q

superior rectus

A

Turns eye superiorly

20
Q

inferior rectus

A

Turns eye inferiorly

21
Q

superior oblique

A

Turns eye inferiorly and laterally
(attaches at back of orbit, passes through trochlea to eyeballs, turns eye down and out)

22
Q

inferior oblique

A

Turns eye superiorly and laterally
(attaches obliquely to the eyeball like the superior oblique)

23
Q

Superficial Neck Muscles

A

Trapezius and Sternocleidomastoid
Innervated by CN 11

24
Q

Trapezius

A

Retract, elevate, depresses scapula; extends neck if used bilaterally

25
Sternocleidomastoid
Turns head or flexes neck if used bilaterally
26
Deep Muscles of the Neck and Head (5)
Extraocular Muscles (CN 346), Suprahyoid muscles (CN 5,7), laryngeal muscles (CN 10), muscles of the tongue (CN 12), pharyngeal muscles (CN 10)
27
Extraocular Muscles
Attach to eyeball and responsible for eye movements - innervated by CN 3, 4, 6
28
Suprahyoid Muscles
In between the mandible and hyoid bone; elevate hyoid bone and move the floor of the mouth. - innervated by CN 5 and 7
29
Pharyngeal Muscles
Form tubular wall of the pharynx and extend from the nasal cavities to the esophagus. Swallowing movements that propel food/water to the esophagus - innervated by CN 10
30
Muscles of the Tongue
Intrinsic tongue muscles: within the tongue and contracting change shape of the tongue Extrinsic tongue muscles: one attachment outside tongue and responsible for all movements of the tongue within and protruding from the oral cavity - innervated by CN 12
31
Laryngeal Muscles
Move the cartilages that are connected to the vocal folds (speech, opening/closing of glottis when swallowing/coughing) - Innervated by CN 10
32
Muscles of Facial Expression
Platysma, frontalis, orbicularis oris, zygomaticus major, buccinator, depressor anguli oris, occipitalis, orbicularis oculi, pterygoids