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Gross Anatomy Lab > Back Muscles (O, I, A, Ns) > Flashcards

Back Muscles (O, I, A, Ns) Flashcards

1
Q

Origin: trapezius

A

Skull - external occipital protuberance

Fasica - ligamentum nuchae

Vertebrae - Spine of C7, T1-T12

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2
Q

Insertion: trapezius

A

Clavicle - lateral 1/3

Scapula - acromion and spine

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3
Q

Action: trapezius

A

Both elevates and depresses shoulder

Retracts scapula

Extends neck

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4
Q

Nerve: trapezius

A

Accessory nerve (Cranial nerve XI)

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5
Q

Origin: Latissimus Dorsi

A

Vertebra - spines of T6-T12

Fasica - thoracolumbar fascia

Pelvic bone - iliac crest

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6
Q

Insertion: Latissimus Dorsi

A

Humerus - intertubercular groove

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7
Q

Action: Latissimus Dorsi

A

Adducts, extends, and medially rotates arm

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8
Q

Nerve: Latissimus Dorsi

A

Thoracodorsal N.

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9
Q

Origin: Levator Scapulae

A

Vertebrae - transverse processes of C1 - C4

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10
Q

Insertion: Levator Scapulae

A

Scapula - superior angle and medial border

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11
Q

Action: Levator Scapulae

A

elevates and abducts scapula

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12
Q

Nerve: Levator Scapulae

A

Dorsal Scapular nerve

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13
Q

Origin: Rhomboid minor

A

Vertebrae - spines of C7, T1

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14
Q

Insertion: Rhomboid minor

A

Scapula - medial border

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15
Q

Action: Rhomboid minor

A

Elevates and abducts scapula

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16
Q

Nerve: Rhomboid minor

A

Dorsal Scapular nerve

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17
Q

Origin: Rhomboid major

A

Vertebra - spines of T2-T5

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18
Q

Insertion: Rhomboid major

A

Scapula - medial border to inferior angle

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19
Q

Action: Rhomboid major

A

Elevates and adducts scapula

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20
Q

Nerve: Rhomboid major

A

Dorsal Scapular nerve

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21
Q

Origin: Teres major

A

Dorsal surface of the inferior angle of the scapula

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22
Q

Insertion: Teres major

A

Crest of the lesser tubercle of the humerus

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23
Q

Action: Teres major

A

Internal rotation, adduction and extension of the arm

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24
Q

Nerve innervation: Teres major

A

Axillary nerve (C5, C6)

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25
Q

Origin: Teres minor

A

Upper two-thirds of the lateral margin of the scapula

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26
Q

Insertion: Teres minor

A

Greater tubercle of the humerus

27
Q

Action: Teres minor

A

External rotation and adduction of the arm

28
Q

Nerve innervation: Teres minor

A

Lower subscapular nerve

29
Q

Origin: Levator Costarum

A

Vertebrae - process of C7, T1 - T11

30
Q

Insertion: Levator Costarum

A

Ribs - inferior to origin

31
Q

Action: Levator Costarum

A

Raises ribs in inspiration

32
Q

Nerve: Levator Costarum

A

Dorsal rami of thoracic spinal nerves

33
Q

Origin: Serratus posterior superior

A

Vertebrae - spines of the cervical and upper thoracic vertebrae

34
Q

Insertion: Serratus posterior superior

A

Ribs

35
Q

Action: Serratus posterior superior

A

Raises ribs in inspiration

36
Q

Nerve: Serratus posterior superior

A

Intercoastal nerves

37
Q

Origin: Serratus posterior inferior

A

Vertebrae - spines of upper lumbar and lower thoracic vertebrae

38
Q

Insertion: Serratus posterior inferior

A

Ribs

39
Q

Action: Serratus posterior inferior

A

Lowers ribs in exhalation

40
Q

Nerve: Serratus posterior inferior

A

Intercoastal nerves

41
Q

Origin: infraspinatus

A

Medial three quarters of infraspinous fossa of scapula and fibrous intermuscular septa

42
Q

Origin: supraspinatus

A

Medial three quarters of supraspinous fossa of scapula, upper surface of spine

43
Q

Insertion: Infraspinatus

A

Middle facet of greater tuberosity of humerus and capsule of shoulder joint

44
Q

Action: Infraspinatus

A

Laterally rotates arm and stabilizes shoulder joint

45
Q

Nerve: Infraspinatus

A

Suprascapular nerve (C5, 6 ) (from upper trunk)

46
Q

Action: Supraspinatus

A

Abducts arm and stabilizes shoulder jnt

47
Q

Insertion: Supraspinatus

A

Superior facet on greater tuberosity of humerus and capsule of shoulder joint

48
Q

Nerve: Supraspinatus

A

Suprascapular N (C5, 6)(from upper trunk)

49
Q

Origin: Splenius

A

Vertebra - spines of T1 - T4

50
Q

Insertion: Splenius

A

Splenius capitis to skull - occipital and temporal bones

Splenius cervicis to vertebrae - transverse processes of C2 - C3

51
Q

Action: Splenius

A

Extend neck and head (rotate in unilateral action)

52
Q

Nerve: Splenius

A

Dorsal rami of spinal nerves

53
Q

Origin: Erector Spinae

Iliocostalis

A

Sacrum, the illiac crest

54
Q

Insertion: lIiocostalis

A

lIiocostalis to ribs and transverse processes

55
Q

Action: IIiocostalis

A

Extend trunk and vertebral column

56
Q

Nerve: lIiocostalis

A

Dorsal rami of spinal nerves

57
Q

Origin: Longissimus

A

Logngissisum from transeverse process of vertebra

58
Q

Insertion: Longissimus

A

Longissimus to transvers process of vertebrae

59
Q

Action: Longissimus

A

Extend trunk and vertebral column

60
Q

Nerve: Longissimus

A

Dorsal rami of spinal nerves

61
Q

Origin: Spinalis

A

Spinalis from spinous process

62
Q

Insertion: Spinalis

A

Spinous processes six levels above

63
Q

Action: Spinalis

A

Extend trunk and vertebral column

64
Q

Nerve: Spinalis

A

Dorsal rami of spinal nerves

Gross Anatomy Lab (9 decks)

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