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PA 5210 - Clinical Gross Anatomy > Muscles - back > Flashcards

Muscles - back Flashcards

1
Q

Superficial Extrinsic Back Muscles

A

Trapezius, Latissimus Dorsi, Rhomboids, Levator scapulae

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2
Q

Intermediate Extrinsic Back Muscles

A

Serratus posterior superior and inferior

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3
Q

What does an intrinsic back muscle do?

A

pertains to vertebral column, movement and posture

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4
Q

Superficial layer of intrinsic back muscles

A

splenius cervicis and capitis

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5
Q

Intermediate layer of intrinsic back muscles

A

erector spinae

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6
Q

Deep Layer of intrinsic back muscles

A

semispinalis, multifidus, rotatores, interspinales, intertransversarii, levatores costarum

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7
Q

Suboccipital Region Muscles

A

Rectus capitis posterior major, Rectus capitis posterior minor, obliquus capitis inferior, obliquus capitis superior

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8
Q

What innervates Trapezius?

A

Accessory Nerve CNXI

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9
Q

What innervates Rhomboids?

A

Dorsal scapular nerve (C5)

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10
Q

What innervates Latissimus dorsi?

A

Thoracodorsal (C7,8)

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11
Q

What innervates Levator Scapula?

A

Dorsal scapular nerve (C5)

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12
Q

What innervates splenius?

A

Dorsal rami (C2-6)

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13
Q

What innervates erector spinae?

A

Dorsal rami

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14
Q

What innervates multifidus?

A

C1-L5 dorsal rami

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15
Q

What innervates rotatores?

A

C1-L5 dorsal rami

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16
Q

What innervates semispinalis?

A

dorsal rami

17
Q

What is the actions of Trapezius?

A

elevates, depresses, rotates anteriorly, retracts scapula

18
Q

What is the actions of the Rhomboids?

A

retracts, rotates inferior, elevates scapula

19
Q

What is the action of Levator Scapula?

A

elevates scapula

20
Q

What is the action of Latissimus dorsi?

A

extends arms and rotates medially

21
Q

What is the action of Serratus Posterior Superior and Inferior?

A

Respiratory

22
Q

What is the action of Splenius Capitis and Cervicis?

A

Extends and laterally bends neck, rotates head to acting side

23
Q

What is the action of erector spinae?

A

Extends and laterally bends everything

24
Q

What is the action of Semispinalis capitis and cervcis?

A

Extends and laterally bends, rotates opposite

25
Q

What is the action of Multifidus?

A

Extends and laterally bends, rotates opposite

26
Q

What is the action of Rotatores?

A

Rotates vertebral column

27
Q

What is the action of Interspinales?

A

Extends trunk and neck

28
Q

What is the action of Intertransversarii?

A

stabilize and laterally flexion of column

29
Q

What is the action of Levatores Costarum?

A

Elevates ribs, aids in resp, lateral flex

PA 5210 - Clinical Gross Anatomy (17 decks)

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