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KIN2320 Final > POSTERIOR AXIO-APPENDICULAR AND SCAPHOHUMERAL MUSCLES > Flashcards

POSTERIOR AXIO-APPENDICULAR AND SCAPHOHUMERAL MUSCLES Flashcards

1
Q

What is the purpose of intrinsic back muscles?

A

maintain posture and control movements of vertebral column

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2
Q

What are the 3 groups of the post. shoulder muscles?

A
  1. superficial posterior axio-appendicular (extrinsic shoulder)
  2. deep posterior axio-appendicular (extrinsic shoulder)
  3. scapulohumeral (intrinsic shoulder) muscles
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3
Q

what are the superficial posterior axio-appendicular muscles?

A
  1. trapezius

2. latissimus dorsi

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4
Q

what are the deep posterior axio-appendicular muscles?

A
  1. levator scapulae

2. rhomboids

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5
Q

what are the scapulohumeral muscles?

A
  1. deltoid
  2. teres major
  3. rotator cuff
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6
Q

what are the muscles of the rotator cuff ?

A
  1. supraspinatus
  2. infraspinatus
  3. teres minor
  4. subscapularis
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7
Q

what is the medial and lateral attachment of trapezius?

A

medial: sup. nuchal line, external occipital protuberance, nuchal lig., spinous processes of C7-T12
lateral: clavicle, acromion, spine of scapula

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8
Q

what are the 3 parts of the trapezius and their actions?

A
  1. descending (superior) part: elevates scapula
  2. middle part: retract scapula
  3. ascending (inferior) part: depresses scapula and lowers shoulders
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9
Q

what is the innervation of the trapezius?

A

cranial nerve XI

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10
Q

what is the medial and lateral attachments of the latissimus dorsi?

A

medial: spinous processes of inf. 6 thoracic vertebrae
lateral: intertubercular sulcus

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11
Q

what is the innervation of the latissimus dorsi?

A

thoracodorsal nerve

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12
Q

what is the action of the latissimus dorsi?

A

extend, adduct, medially rotate shoulder

raise body towards arms during climbing

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13
Q

what are the medial and lateral attachments of the levator scapulae?

A

medial: transverse processes of C1-C4
lateral: medial border of scapula

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14
Q

what is the innervation of the levator scapulae?

A

dorsal scapular, cervical spinal nerve

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15
Q

what is the action of levator scapulae?

A

elvelate scapula, tilts glenoid cavity by rotating scapula

bilaterally: extend neck
unilaterally: lateral flexion of neck

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16
Q

what are the medial and lateral attachments of rhomboid minor?

A

medial: nuchal ligament, spinous processes of C7-T1
lateral: scapular spine

17
Q

what are the medial and lateral attachments of rhomboid major?

A

medial: spinous processes of T2-T5
lateral: medial border of scapula

18
Q

what is the innervation of rhomboid minor and rhomboid major?

A

dorsal scapular nerve

19
Q

what is the action of rhomboid min and rhomboid major?

A

retract scapula, rotate it to depress glenoid cavity, fix scapula to thoracic wall

20
Q

what are the proximal and distal attachments of the deltoid?

A

proximal: clavicle, acromion, spine of scapula
distal: deltoid tuberosity of humerus

21
Q

what is the innervation of the deltoid?

A

axillary nerve

22
Q

what is the action of the deltoid?

A

clavicular (anterior) part: flex and medially rotate shoulder

acromial (middle) part: abducts shoulder

spinal (posterior) part: extend and laterally rotate shoulder

23
Q

what are the proximal and distal attachments of supraspinatus?

A

proximal: supraspinous fossa of scapula
distal: greater tubercle of humerus

24
Q

what is the innervation of the supraspinatus?

A

suprascapular nerve

25
Q

what is the action of supraspinatus?

A

first 15 degrees of shoulder abduction

26
Q

what are the proximal and distal attachments of infraspinatus?

A

proximal: infraspinous fossa of scapula
distal: greater tubercle of humerus

27
Q

what is the innervation of infraspinatus?

A

suprascapular nerve

28
Q

what is the action of infraspinatus?

A

laterally rotate shoulder, help hold humeral head in glenoid cavity

29
Q

what are the proximal and distal attachments of teres minor?

A

proximal: lateral border of scapula
distal: greater tubercle of humerus

30
Q

what is the innervation of teres minor?

A

axillary nerve

31
Q

what is the action of teres minor?

A

laterally rotate shoulder, help hold humeral head in glenoid cavity

32
Q

what are the proximal and distal attachments of teres major?

A

proximal: lateral border of scapula, inferior angle of scapula
distal: intertubercular sulcus of humerus

33
Q

what is the innervation of teres major?

A

lower subscapular nerve

34
Q

what is the action of teres major?

A

adducts and medially rotates shoulder

35
Q

what are the proximal and distal attachments of subscapularis?

A

proximal: subscapular fossa
distal: lesser tubercle of humerus

36
Q

what is the innervation of subscapularis?

A

upper and lower subscapular nerves

KIN2320 Final (10 decks)

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