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MED 1022 > muscles of the upper limb MP > Flashcards

muscles of the upper limb MP Flashcards

1
Q

Rhomboid major

origin

A

Spinous processes of the T2 to T5 vertebrae

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2
Q

Rhomboid major

Insertion

A

Medial border of the scapula

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3
Q

Rhomboid major

action

A

Retracts (retract=draw bak) the scapula, rotates it to depress the glenoid cavity.
also fixes the scapula to the thoracic wall.

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4
Q

Rhomboid major

INNERVATION

A

Dorsal

scapular nerve

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5
Q

Rhomboid minor

Origin

A

spinous processes of C7–T1

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6
Q

Rhomboid minor

insertion

A

Medial border of scapula

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7
Q

Rhomboid minor

Actions

A

Retracts and rotates scapula,

fixes scapula to thoracic wall

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8
Q

Rhomboid minor

INNERVATION

A

Dorsal

scapular nerve

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9
Q

Levator scapulae

Origin

A

transverse processes of C1 - C4 vertebrae

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10
Q

Levator scapulae

Insertion

A

Superior part of medial border of scapula

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11
Q

Levator scapulae

Actions

A

Elevates scapula and tilts

its glenoid cavity inferiorly by rotating scapula

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12
Q

Levator scapulae

INNERVATION

A

Dorsal scapular
and cervical
(C3 and C4)
nerves

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13
Q

Serratus anterior

Origin

A

upper 8-9 ribs

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14
Q

Serratus anterior

Insertion

A

medial margin of the scapula

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15
Q

Serratus anterior

Actions

A

Protracts (protract= draw out/lengthen ) and stabilizes scapula
Rotates scapula upward, and
pulls it anterior
toward thoracic wall

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16
Q

Serratus anterior

INNERVATION

A 
long thoracic
(C05-C07)
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17
Q

Pectoralis minor

Origin

A

Third to fifth ribs, near their costal cartilages

18
Q

Pectoralis minor

Insertion

A

coracoid process of the scapula

19
Q

Pectoralis minor

Actions

A

Depresses scapula

& stabilises it (by drawing it inferiorly and anteriorly against the thoracic wall

20
Q

Pectoralis minor

INNERVATION

A

Medial pectoral

nerve

21
Q

Subclavius

Origin

A

Junction of first rib and

costal cartilage

22
Q

Subclavius

Insertion

A

inferior surface of middle third of clavicle)

23
Q

Subclavius

Actions

A

depresses clavicle

24
Q

Subclavius

INNERVATION

A

Nerve to

subclavius

25
Q

Trapezius

Origin

A
  1. external occipital protuberance,
  2. nuchal ligament,
  3. medial superior nuchal line,
  4. spinous processes of vertebrae C7-T12
26
Q

Trapezius

Insertion

A
  1. lateral third of the clavicle,
  2. acromion process, and
  3. spine of scapula
27
Q

Trapezius

Actions

A

rotation,
retraction,
elevation,
depression of scapula

28
Q

Trapezius

Innervation

A

Spinal root of accessory nerve (cranial nerve XI)

and cervical nerves (C3 and C4)

29
Q

Sternocleidomastoid (SCM)

Origin

A

Manubrium

sterni and medial portion of the clavicle

30
Q

Sternocleidomastoid (SCM)

Insertion

A

Mastoid process of the temporal bone,

superior nuchal line

31
Q

Sternocleidomastoid (SCM)

Actions

A 
Tilts head to one side, i.e., 
laterally flexes and rotates head 
so face is turned superiorly toward 
opposite side; acting together, 
muscles flex neck
32
Q

Sternocleidomastoid (SCM)

Innervation

A

Spinal root of cranial nerve CN XI and C2-C3

33
Q

Omohyoid

Origin

A

Upper border of the scapula

34
Q

Omohyoid

Insertion

A

inferior border of Hyoid bone

35
Q

Omohyoid

Actions

A

depresses, move backwards, n fixes hyoid

bone

36
Q

Omohyoid

Innervation

A

C1-C3 from ansa cervicalis (a loop of nerves that are part of the cervical plexus)

37
Q

Pectoralis major

Origin

A 
4 origins
1. Medial half of clavicle; 
2. sternum; 
3. superior six costal cartilages; 
4. aponeurosis of external abdominal oblique (extra
info on doc)
38
Q

Pectoralis major

Insertion

A

Intertubercular (bw tubercles) groove of humerus

39
Q

Pectoralis major

Actions

A
  1. Clavicular head: flexes the humerus.
  2. Sternocostal head: extends the humerus.
  3. As a whole, adducts and medially rotates the humerus.
  4. It also draws the scapula anteriorly and inferiorly
40
Q

Pectoralis major

Innervation

A

Lateral and medial pectoral nerves

MED 1022 (16 decks)

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