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Kluthe A&P 231 Muscles > Axial Skeleton Muscles > Flashcards

Axial Skeleton Muscles Flashcards

1
Q

Pectoralis Minor

A

Action: Elevate upper ribs; Origin: Ribs 3-5; Insertion: Coracoid process

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2
Q

Serratus Anterior

A

Action: Move scapula forward, rotate scapula; Origin: Ribs 1-8; Insertion: Medial border of scapula

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3
Q

External Intercostals

A

Action: Elevate rib cage, aid in inspiration; Origin: Inferior border of rib above; Insertion: Superior border of rib below

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4
Q

Internal Intercostals

A

Action: Depress rib cage, aid in expiration; Origin: Superior border of rib below; Insertion: Inferior border of rib above

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5
Q

Diaphragm

A

Action: Prime mover of inspiration, flattens when contracts, lengthens thoracic cavity

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6
Q

Rectus Abdominis

A

Action: Flex and rotate vertebral column; Origin: Pubic crest and symphysis; Insertion: Xiphoid process and ribs 5-7 (cartilage)

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7
Q

External Oblique

A

Action: Flex and rotate vertebral column, trunk rotation and lateral flexion; Origin: Ribs 5-12; Insertion: Pubic crest and iliac crest, linea alba

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8
Q

Internal Oblique

A

Action: Flex and rotate vertebral column, trunk rotation and lateral flexion; Origin: Iliac crest, inguinal ligament, lumbar fascia; Insertion: Ribs 9-12 (cartilage), linea alba, pubic crest

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9
Q

Transversus Abdominis

A

Action: Compress abdominal contents; Origin: Ribs 6-12 (cartilage), inguinal ligament, lumbar fascia; Insertion: Pubic crest, linea alba

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10
Q

Trapezius

A

Action: Extend neck; raise, rotate, and adduct scapula; Origin: Occipital bone and spinous process of C7 and processes of thoracic vertebrae; Insertion: Acromion and spine of scapula, lateral third of clavicle

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11
Q

Latissimus Dorsi

A

Action: Arm extension, adduct and rotate arm; Origin: Spinous process of T6-L5, iliac crest; Insertion: Intertubercle sulcus of humerus

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12
Q

Erector Spinae: Longissimus, iliocostalis, spinalis

A

Action: As a pair: extend neck and vertebral column; Origin: Iliac crest, transverse process of C7-T12; Insertion: Occipital bone and spinous process of cervical vertebrae

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13
Q

Epicranius Frontalis

A

Action: Raises eyebrows; Origin: Aponeurosis; Insertion: Skin of eyebrows

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14
Q

Epicranius Occipitalis

A

Action: Pulls scalp posteriorly; Origin: Occipital bone; Insertion: Aponeurosis

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15
Q

Orbicularis Oculi

A

Action: Close eye lids; Origin: frontal and maxillary bones; Insertion: Skin of eyelid

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16
Q

Risorius

A

Action: Draws corner of lip laterally; Origin: Fascia of masseter; Insertion: Skin at angle of mouth

17
Q

Orbicularis oris

A

Action: Close lips; Origin: Maxilla and mandible; Insertion: Skin of mouth

18
Q

Zygomaticus

A

Action: Elevates corners of mouth; Origin: Zygomatic bone; Insertion: Skin and muscle at corners of mouth

19
Q

Buccinator

A

Action: Draws corner of lips laterally; Origin: Molar region of mandible and maxillae; Insertion: Orbicularis oris

20
Q

Depressor Labii Inferioris

A

Action: Draws lower lip inferiorly; Origin: Body of mandible; Insertion: skin and muscle of lower lip

21
Q

Depressor Anguli Oris

A

Action: Draws corders of mouth down and lateral; Origin: Mandible; Insertion: Skin and muscle at angle of mouth

22
Q

Mentalis

A

Action: Protrudes lower lip; Origin: Anterior mandible; Insertion: Skin of chin

23
Q

Masseter

A

Action: Elevate mandible; Origin: Zygomatic arch; Insertion: Angle and ramus of mandible

24
Q

Temporalis

A

Action: Elevate and retract mandible; Origin: Temporal fossa; Insertion: Coronoid process of mandible

25
Q

Platysma

A

Action: Depress mandible; Origin: Fascia of chest; Insertion: Lower margin of mandible, skin and muscle of corner of mouth

26
Q

Sternocleidomastoid

A

Action: Flex neck and rotate head; Origin: Manubrium of sternum and clavicle; Insertion: Mastoid process of temporal bone, superior nuchal line occiput

27
Q

Scalenes

A

Action: Flex and rotate neck, elevate ribs; Origin: Transverse process of cervical vertebrae; Insertion: Ribs 1 and 2

28
Q

Digastrics

A

Action: Elevate hyoid, open mouth, depress mandible; Origin: Lower mandible and mastoid process; Insertion: Hyoid bone

29
Q

Stylohyoid

A

Action: Elevates and retracts hyoid; Origin: Styloid process of temporal bone; Insertion: Hyoid bone

30
Q

Mylohyoid

A

Action: Elevates hyoid bone during swallowing; Origin: Medial mandible; Insertion: Hyoid bone

31
Q

Sternohyoid

A

Action: Depress larynx; Origin: Manubrium and clavicle; Insertion: Hyoid bone

32
Q

Levator scapulae

A

Action: Raises scapula; Origin: Transverse process of C1-C4; Insertion: Superior border of scapula

Kluthe A&P 231 Muscles (3 decks)

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