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BPM DLA1 > Back muscles > Flashcards

Back muscles Flashcards

1
Q

2 bones that extrinsic back muscles usually act on

A

humurus and scapula

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2
Q

2 general innervation of extrinsic back muscle

A

brachial plexus and ventral rami

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3
Q

innervation of intrinsic back muscle

A

dorsal rami

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4
Q

on which bone does intrinsic back muscle act on ?

A

vertebral column

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5
Q

2 bones involved in shoulder girdle

A

clavicle and scapula

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6
Q

2 joints involved in shoulder girdle

A

acromicoclavicular and sternoclavicular

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7
Q

2 bones involved in shoulder joint

A

glenoid cavity of scapula

head of humerus

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8
Q

Hilton’s law

A

a nerve that supplies the muscle moving a joint will also provide sensory supply to the joint.

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9
Q

Insertion and action of trapezius (3 actions)

A 
spine of scapula 
thus acting on scapula 
1. Adduction of scapula (retraction)
2. elevation and depression of scapula
3. raise arm above horizontal level
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10
Q

innervation of trapezium

A

spinal accessory nerve (CN XI)

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11
Q

Insertion and action of latissimus dorsi

A 
insertion : medial side of humerus
thus acts on humerus
1. adduction of humerus
2. medial rotation of humerus
3. extension of humerus
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12
Q

innervation of latissimus dorsi

A

thoracodorsal nerve

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13
Q

Insertion and action of rhomboid

A

acts on scapula

- adducts/retract scapula

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14
Q

innervation of rhomboid

A

dorsal scapular nerve

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15
Q

Insertion and action levator scapulae

A

elevate scapula

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16
Q

innervation of levator scapulae

A

dorsal scapular nerve

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17
Q

use of serratus posterior superior and inferior

A

acessory muscles for respiration

18
Q

5 scapular muscles

A

deltoid
supraspinatus
infraspinatus
teres minor and major

19
Q

action of supraspinatous

A

inserted at greater tubercle of humerus

so it abducts humerus (initiation of abduction)

20
Q

innervation of supraspinatous

A

suprascapular nerve

21
Q

action of infraspinatus

A

lateral rotation of humerus

22
Q

innervation of infraspinatus

A

suprascapular nerve

23
Q

action of teres minor

A

lateral rotation of humerus

24
Q

innervation of teres minor

A

axillary nerve

25
Q

action of teres major

A 
inserted into medial side of humerus
so 
- adduction of humerus
- medial rotation 
- extension of humerus
26
Q

innervation of teres major

A

lower subscapular nerve

27
Q

action of deltoid muscle

A

abduction (20~90 degree of abduction)

28
Q

innervation of deltoid

A

axillary nerve

29
Q

Pectoralis major action

A

adduction of humerus
medial rotation
flexion

30
Q

innervation of petoralis major

A

medial & lateral pectoral nerve

31
Q

pectoralis minor action

A

stabilize scapula

32
Q

innervation of petoralis minor

A

medial & lateral pectoral nerve

33
Q

serratus anterior action

A

abducts scapula

34
Q

innervation of serratus anterior action

A

long thoracic nerve

35
Q

action of splenius capitis and cervicis (2)

A

bilateral contraction - extension of neck
unilateral contraction - lateral flexion and rotation of head
* for rotation we need oblique muscle.

36
Q

3 muscles in erector spinae group

A
  • spinalis
  • longissimus
  • iliocostalis
37
Q

action of erecor spinae group (2)

A

bilateral contraction : extension of trunk

unilateral contraction : lateral flexion of trunk

38
Q

3 muscles in transversospinalis group

A
  • semispinalis (4-6 segments)
  • rotatores (1-2 segments)
  • multifidus ( 2-4 segments)
39
Q

roles of transversospinalis group

A

stabilize vertebral column

40
Q

Action of transversospinalis group(2)

A

bilateral contraction : extend trunk, neck, head

unilateral contraction : rotate to opposite side and laterally flex

41
Q

Triangle of ausculation

A

medial : trapezius
lateral : medial border of scapula
inferior : latissimus dorsi
* best place to auscultate heart and lung sounds on the back

42
Q

triangle of petit

A

also called lumbar triangle

  • site of lumbar herniation (herniation of intestinal content)
  • between lateral, external oblique and iliac crest

BPM DLA1 (47 decks)

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