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A&P 1 > Muscles 1 > Flashcards

Muscles 1 Flashcards

1
Q

Frontalis

A

Raises scalp and eyebrows
Origin: Occipital Bone
Insertion: Skin of eyebrow & nose

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2
Q

Occipital

A

Draws scalp backwards

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3
Q

Orbicularis Oculi

A

Closes eyelid
Origin: Maxilla & Frontal Bones
Insertion: Circles orbit and inserts near origin

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4
Q

Orbicularis oris

A

Closes, compresses lips
Origin: Nasal septum, maxilla, mandible
Insertion: Fascia & other muscles of lips

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5
Q

Buccinator

A

Compresses cheek, sucking
Origin: Mandible & Maxilla
Insertion: Orbicularis oris at angle of mouth

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6
Q

Temporalis

A

Elevates and retracts mandible (chewing)
Origin: Temporal fossa
Insertion: Anterior portion of mandibular ramus & coronoid process

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7
Q

Masseter

A

Elevates and protracts mandible (chewing)
Origin: Zygomatic arch
Insertion: Lateral side of mandibular ramus

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8
Q

Digastric

A

Depresses mandible, elevates hyoid (speech and swallowing)
Origin: Mastoid Process (posterior belly)
Insertion: Mandible near midline

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9
Q

Mylohyoid

A

Elevates hyoid, mouth and tongue (swallowing)
Origin: Body of mandible
Insertion: Hyoid

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10
Q

Sternohyoid

A

Depresses hyoid and larynx
Origin: Manubrium and 1st costal cartilage
Insertion: Hyoid

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11
Q

Sternocleidomastoid

A

Flexes, rotates head and neck

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12
Q

Scalenes

A

Flexes rotates head and neck, elevates rib 1&2
Origin: Tranverse Processes C2-C6
Insertion: 1st & 2nd rib

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13
Q

Levator Scapulae

A

Elevates, retracts & rotates scapula; flexes neck
Origin: Transverse Processes of C1-C4
Insertion: Superior angle of scapula

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14
Q

Pectoralis Major

A

Shoulder actions
Origin: Clavicle, Sternum, superior six costal cartilges, & abdominal aponeuorsis
Insertion: Lateral crest of intertubercular groove

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15
Q

Pectoralis minor

A

Depresses scapula, elevates ribs
Origin: 3-5th ribs
Insertion: Coracoid process of scapula

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16
Q

Serratus anterior

A

Abducts (moves forward) and rotates scapula
Origin: 1-8,9 ribs
Insertion: Medial border of scapula

17
Q

Diaphragm

A

Inspiration; depresses thorax floor

18
Q

External intercostals

A

Inspiration; elevates ribs
Origin: inferior margin of each rib
Insertion: Superior border of next rib below

19
Q

Internal intercostals

A

Expiration; depresses ribs
Origin: Superior margin of each rib
Insertion: Inferior border of next rib above

20
Q

Trapezius

A

Extends head; elevates, adducts and rotates scapula
Origin: External occipital protuberance, ligamentum nuchae, & spinous process c7-t12
Insertion: Clavicle, acromion process, & scapular spine

21
Q

Latissimus dorsi

A

Prime extensor of humerus; adducts and medially rotates arm
Origin: spinous processes of t7-L5; sacrum & iliac crest; inferior angle of scapula in some people
Insertion: Medial crest of intertubercular groove

A&P 1 (2 decks)

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