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functional anatomy > upper limb > Flashcards

upper limb Flashcards

1
Q

Pectoralis Major - Action/Function

A

Adducts and medially rotates the humerus, draws the scapula anteriorly and inferiorly; clavicular head flexes the humerus, sternocostal head extends the humerus from a flexed position.

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2
Q

Pectoralis Minor - Action/Function

A

Stabilizes the scapula by drawing it inferiorly and anteriorly against the thoracic wall.

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3
Q

Subclavius - Action/Function

A

Anchors and depresses the clavicle.

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4
Q

Serratus Anterior - Action/Function

A

Protracts the scapula and holds it against the thoracic wall, rotates the scapula.

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5
Q

Trapezius - Action/Function

A

Descending part elevates, ascending part depresses, and the middle part retracts the scapula. Descending and ascending parts together rotate the glenoid cavity superiorly

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6
Q

Latissimus Dorsi - Action/Function

A

Extends, adducts, and medially rotates the humerus.

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7
Q

Levator Scapulae - Action/Function

A

Elevates the scapula and rotates its glenoid cavity inferiorly by rotating the scapula.

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8
Q

Rhomboid Minor - Action/Function

A

Retracts the scapula and rotates its glenoid cavity inferiorly; fixes the scapula to the thoracic wall.

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9
Q

Rhomboid Major - Action/Function

A

Retracts the scapula and rotates its glenoid cavity inferiorly; fixes the scapula to the thoracic wall.

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10
Q

Deltoid - Action/Function

A

Clavicular part flexes and medially rotates the humerus, acromial part abducts the humerus, spinal part extends and laterally rotates the humerus.

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11
Q

Subscapularis - Action/Function

A

Medially rotates the humerus and acts as a dynamic stabilizer of the glenohumeral joint as part of the rotator cuff.

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12
Q

Supraspinatus - Action/Function

A

Abducts the humerus and is part of the rotator cuff.

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13
Q

Infraspinatus - Action/Function

A

Laterally rotates the humerus and is part of the rotator cuff.

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14
Q

Teres Minor - Action/Function

A

Laterally rotates the humerus and is part of the rotator cuff.

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15
Q

Teres Major - Action/Function

A

Adducts and medially rotates the humerus.

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16
Q

Biceps Brachii - Action/Function

A

Supinates the forearm and flexes the supinated forearm; the short head resists dislocation of the shoulder.

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17
Q

Brachialis - Action/Function

A

Flexes the forearm in all positions.

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18
Q

Triceps Brachii - Action/Function

A

Extends the elbow; the long head resists dislocation of the shoulder

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18
Q

Coracobrachialis - Action/Function

A

Helps to flex and adduct the arm; resists dislocation of the shoulder.

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19
Q

Anconeus - Action/Function

A

Assists the triceps in elbow extension, stabilizes the elbow joint, and may abduct the ulna during pronation.

20
Q

Pronator Teres - Action/Function

A

Pronates and flexes the elbow.

21
Q

Flexor Carpi Radialis - Action/Function

A

Flexes and abducts the wrist.

22
Q

Palmaris Longus - Action/Function

A

Flexes the wrist and tenses the palmar aponeurosis.

23
Q

Flexor Carpi Ulnaris - Action/Function

A

Flexes and adducts the wrist.

24
Q

Flexor Digitorum Superficialis - Action/Function

A

Flexes the proximal interphalangeal and metacarpophalangeal joints of digits 2-5.

25
Q

Flexor Digitorum Profundus - Action/Function

A

Flexes the distal interphalangeal joints of digits 2-5, as well as the proximal interphalangeal and metacarpophalangeal joints.

26
Q

Flexor Pollicis Longus - Action/Function

A

Flexes the thumb.

27
Q

Pronator Quadratus - Action/Function

A

Pronates the forearm, and its deep fibers bind the radius and ulna together.

28
Q

Brachioradialis - Action/Function

A

Flexes the elbow, with maximal effect when the elbow is in mid-pronation.

29
Q

Extensor Carpi Radialis Longus - Action/Function

A

Extends and abducts the wrist; active during fist clenching.

30
Q

Extensor Carpi Radialis Brevis - Action/Function

A

Extends and abducts the wrist.

31
Q

Extensor Digitorum - Action/Function

A

Extends the medial four digits at the metacarpophalangeal and interphalangeal joints.

32
Q

Extensor Digiti Minimi - Action/Function

A

Extends the 5th digit at the metacarpophalangeal and interphalangeal joints.

33
Q

Extensor Carpi Ulnaris - Action/Function

A

Extends and adducts the wrist; active during fist clenching.

34
Q

Supinator - Action/Function

A

supinates the forearm

35
Q

Abductor Pollicis Longus - Action/Function

A

Abducts and extends the thumb at the carpometacarpal joint.

36
Q

Extensor Pollicis Brevis - Action/Function

A

Extends the thumb at the metacarpophalangeal and carpometacarpal joints.

37
Q

Extensor Pollicis Longus - Action/Function

A

Extends the thumb at the interphalangeal joint, and also extends the metacarpophalangeal and carpometacarpal joints.

38
Q

Extensor Indices - Action/Function

A

Extends the 2nd digit and helps extend the wrist.

39
Q

Opponens Pollicis - Action/Function

A

Opposes the thumb by drawing the 1st metacarpal medially to the palm and rotating it medially.

40
Q

Abductor Pollicis Brevis - Action/Function

A

Abducts the thumb and assists in opposition.

41
Q

Flexor Pollicis Brevis - Action/Function

A

Flexes the thumb.

42
Q

Adductor Pollicis - Action/Function

A

Adducts the thumb toward the lateral border of the palm.

43
Q

Abductor Digiti Minimi - Action/Function

A

Abducts the 5th digit and assists in flexing its proximal phalanx.

44
Q

Flexor Digiti Minimi Brevis - Action/Function

A

Flexes the proximal phalanx of the 5th digit.

45
Q

Opponens Digiti - Action/Function

A

Draws the 5th metacarpal anteriorly and rotates it, bringing the 5th digit into opposition with the thumb.

46
Q

Lumbricals - Action/Function

A

Flex the metacarpophalangeal joints and extend the interphalangeal joints of digits 2-5.

47
Q

Dorsal Interossei - Action/Function

A

Abduct digits 2-4 from the axial line and assist in flexing the metacarpophalangeal joints and extending the interphalangeal joints.

48
Q

Palmar Interossei - Action/Function

A

Adduct digits 2, 4, and 5 toward the axial line and assist in flexing the metacarpophalangeal joints and extending the interphalangeal joints.

functional anatomy (1 decks)

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