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PT 504 Anatomy Lab > Posterior Shoulder > Flashcards

Posterior Shoulder Flashcards

1
Q

serratus anterior origin

A

External surfaces of lateral parts of 1st-8th ribs

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2
Q

serratus anterior insertion

A

Anterior surface of medial border of scapula

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3
Q

serratus anterior innervation

A

Long Thoracic nerve (C6,C7 fibers)

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4
Q

serratus anterior action

A

Protracts scapula and holds it against thoracic wall; rotates scapula

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5
Q

supraspinatus origin

A

supraspinatus fossa

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6
Q

supraspinatus insertion

A

Greater tubercle of humerus

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7
Q

supraspinatus innervation

A

Suprascapular nerve (C5,C6)

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8
Q

supraspinatus action

A

Assists deltoid in abducting the arm; Acts with rotator cuff muscles

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9
Q

infraspinatus origin

A

Infraspinatus fossa of scapula

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10
Q

infraspinatus insertion

A

Middle facet of greater tubercle of humerus

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11
Q

infraspinatus innervation

A

Suprascapular nerve (C5,C6)

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12
Q

infraspinatus action

A

Laterally rotates arm; acts with rotator cuff muscles

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13
Q

teres minor origin

A

Middle part of lateral border of scapula

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14
Q

teres minor insertion

A

Inferior facet of greater tubercle of humerus

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15
Q

teres minor innervation

A

Axillary nerve (C5, C6)

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16
Q

teres minor action

A

Laterally rotates arms; and acts with rotator cuff muscles

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17
Q

teres major origin

A

Posterior surface of inferior angle of scapula

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18
Q

teres major insertion

A

Medial lip of intertubercular sulcus of humerus

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19
Q

teres major innervation

A

Lower subscapular nerve (C5,C6)

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20
Q

teres major action

A

Adducts and medially rotates arm

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21
Q

subscapularis origin

A

Subscapular fossa

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22
Q

subscapularis insertion

A

Lesser tubercle of humerus

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23
Q

subscapularis innervation

A

Upper and Lower subscapular nerves (C5,C6,C7)

24
Q

subscapularis action

A

Medially rotates arm; holds head of humerus in glenoid cavity

25
Q

lattisimus dorsi origin

A

Spinous processes of inferior 6 thoracic vertebrae, thoracolumbar fascia, iliac crest, inferior 3 or 4 ribs

26
Q

lattisimus dorsi insertion

A

Floor of intertubercular sulcus of humerus

27
Q

lattisimus dorsi innervation

A

Thoracodorsal nerve (C6.C7.C8)

28
Q

lattisimus dorsi action

A

Extends, adducts, and medially rotates humerus; raises body towards arms during climbing

29
Q

rhomboid major origin

A

Spinous processes of T2-T5

30
Q

rhomboid major insertion

A

Medial border of scapula from level of spine to inferior angle

31
Q

rhomboid major innervation

A

Dorsal scapular nerve (C4,C5)

32
Q

rhomboid major action

A

Retracts scapula and rotate it to depress glenoid cavity; fix scapula to thoracic wall

33
Q

rhomboid minor origin

A

Nuchal ligament; spinous processes of C7 and T1

34
Q

rhomboid minor insertion

A

Smooth triangular area at medial end of scapular spine

35
Q

rhomboid minor innervation

A

Dorsal scapular nerve (C4,C5)

36
Q

rhomboid minor action

A

Retract scapula and rotate it to depress glenoid cavity; fix scapula to thoracic wall

37
Q

levator scapulae origin

A

Posterior tubercles of transverse processes of C1-C4

38
Q

levator scapulae insertion

A

Medial Border of scapula superior to root of scapular spine

39
Q

levator scapulae innervation

A

Dorsal Scapular nerve (C5) and Cervical nerves C3 and C4

40
Q

levator scapulae action

A

Elevates scapula and tilts glenoid cavity inferiorly by rotating scapula

41
Q

trapezius origin

A

Medial third of superior nuchal line; nuchal ligament; spinous processes C7-T12

42
Q

trapezius insertion

A

Lateral third of clavicle; acromion and spine of scapula

43
Q

trapezius innervation

A

Spinal Accessory nerve (XI) motor and C3,C4 spinal nerves pain and proprioception

44
Q

trapezius action

A

Descending part elevates; ascending part depresses; middle (or all) retracts scapula’ descending and ascending parts act together to rotate glenoid cavity superiorly

45
Q

omohyoid origin

A

Superior bordee of the Scapula

46
Q

omohyoid insertion

A

Hyoid Bone

47
Q

omohyoid innervation

A

Ansa cervicalis from cervical plexus (C1-C3)

48
Q

omohyoid action

A

Fixes or depresses hyoid bone

49
Q

deltoid middle head origin

A

Acromion

50
Q

deltoid posterior head origin

A

Scapular spine

51
Q

deltoid anterior head origin

A

Lateral third of clavicle

52
Q

Deltoid insertion

A

Deltoid tuberosity on lateral side of the humerus

53
Q

Deltoid innervation

A

Axillary Nerve (C5,C6)

54
Q

deltoid anterior head action

A

Flexion and internal rotation of humerus

55
Q

deltoid middle head action

A

Abduction of humerus

56
Q

deltoid posterior head action

A

Extension and lateral rotation of humerus

PT 504 Anatomy Lab (15 decks)

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