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human gross anatomy > muscles of the upper extremities > Flashcards

muscles of the upper extremities Flashcards

1
Q

lumbricals OINA

A

Action: Flex the metacarpophalangeal joints and extend the interphalangeal joints

Origin: 1 and 2 Digits- Lateral 2 tendons of Flexor Digitorum Profundus Unipennate
3 and 4 Digits- Medial 3 tendons of Flexor Digitorum Profundus Bipennate

Insertion: Lateral extensor expansions of Digits 2-5

Nerve: 1 and 2 Lumbrical- Median Nerve (digital branch) C8 and T1
3 and 4 Lumbrical- Ulnar Nerve (deep branch) C8 and T1

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2
Q

palmar interossei (PADD) OINA

A

Action: Adduct Digits 2,4, and 5; assist in flexion of MCP and extension of IP Joints

Origin: Palmar Surfaces of 2,4 and 5 metacarpals

Insertion: Bases of Proximal Phalanges; extensor expansions of 2,4 and 5 digits

Nerve: Ulnar Nerve (Deep branch) C8 and T1

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3
Q

dorsal interossei (DAB) OINA

A

Action: Abduction of Digits 2.4 and 5; assists in flexion of MCP and IP Joints

Origin: Adjacent Sides of 2 metacarpals

Insertion: Bases of Proximal Phalanges; extensor expansions of 2,4, and 5 digits

Nerve: Ulnar Nerve C8 (Deep branch) and T1

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4
Q

flexor carpi radialis OINA

A

Action: flex the wrist and radial deviation

Origin: Medial epicondyle

Insertion: Bases of 2 and 3 Metacarpals

Nerve: Median Nerve C6 and C7

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5
Q

flexor carpi ulnaris OINA

A

Action: flex the wrist and ulnar deviation

Origin: Humoral head- medial epicondyle
Ulnar Head- posterior ulna

Insertion: pisiform, hook of the hamate, and base of 5th metacarpal

Nerve: ulnar nerve C7 and C8

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6
Q

flexor digitorum superficialis OINA

A

Action: flexes the middle 4 digits at proximal IP joints, also it flexes proximal phalanges at MCP joints

Origin: Humero-ulnar head- medial epicondyle
Radial head- superior radius

Insertion: Through the shafts of middle phalanges of 4 digits

Nerve: Median Nerve C7, C8, and T1

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7
Q

flexor digitorum profundus OINA

A

Action: Flex the middle 4 fingers at MCP IP and DIP
Assists in flexion of the wrist

Origin: Proximal Ulna and Interosseus Membrane

Insertion: Medial- Bases of distal phalanges of digits 4-5
Lateral- Bases of distal phalanges of digits 2-3

Nerve: 2-3 digits- Median Nerve (AIN) C8 and T1
4-5 Digits- Ulnar Nerve C8 and **T1)

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8
Q

flexor pollicis longus OINA

A

Action: Flexes phalanges of 1st digit

Origin: Anterior Radius and Adjacent interosseus membrane

Insertion: Distal phalanx of the thumb

Nerve: Median Nerve (AIN) C8 and T1

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9
Q

pronator quadratus OINA

A

Action: Pronate the forearm

Origin: Medial, anterior distal ulna

Insertion: Lateral, anterior distal radius

Nerve: Median (AIN) C8 and T1

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10
Q

flexor pollicis brevis OINA

A

Action: flexes the thumb at CMC and MCP joints
assists in opposition of the thumb

Origin: flexor retinaculum and tubercles of scaphoid and trapezium

Insertion: lateral side of base of proximal phalanx of the thumb

Nerve: Superficial- median nerve (recurrent branch) C8 and T1
Deep- ulnar nerve (deep branch)C8 and T1

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11
Q

abductor pollicis brevis OINA

A

Action: abduct the thumb
assist in opposition of the thumb

Origin: flexor retinaculum and tubercles of scaphoid and trapezium

Insertion: lateral side of base of proximal phalanx of the thumb

Nerve: Median Nerve C8 and T1

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12
Q

opponens pollicis OINA

A

Action: oppose thumb

Origin: flexor retinaculum and tubercles of scaphoid and trapezium

Insertion: lateral side of 1st metacarpal

Nerve: Median nerve C8 and T1

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13
Q

flexor digiti minimi OINA

A

Action: flex the proximal phalanx of 5th digit

Origin: flexor retinaculum and hook of hamate

Insertion: medial base of proximal phalanx of pinky

Nerve: Ulnar nerve C8 and T1

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14
Q

abductor digiti minimi OINA

A

Action: abduct the pinky

Origin: pisiform

Insertion: medial base of proximal phalanx of pinky

Nerve: Ulnar Nerve C8 and T1

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15
Q

opponens digiti minimi OINA

A

Action: opposition of the pinky

Origin: hook of hamate and flexor retinaculum

Insertion: medial border of 5th metacarpal

Nerve: Ulnar nerve C8 and T1

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16
Q

adductor pollicis OINA

A

Action: adducts the thumb

Origin: Oblique- bases of 2nd and 3rd metacarpal, capitate, and adjacent carpals
Transverse- anterior surface of shaft of 3rd metacarpal

Insertion: medial side of base of proximal phalanx of the thumb

Nerve: Ulnar Nerve C8 and T1

17
Q

extensor carpi radialis longus and brevis OINA

A

Action: extends the wrist and radial deviation

Origin: L- lateral supra epicondylar ridge of humerus
B- lateral epicondyle

Insertion: L- dorsal base of 2nd metacarpal
B- dorsal base of 3rd metacarpal

Nerve: radial nerve C6, C7, and C8

18
Q

extensor digitorum OINA

A

Action: extend medial 4 digits at MCP and IP joints

Origin: lateral epicondyle

Insertion: extensor expansions of medial four digits

Nerve: radial nerve C7 and C8

19
Q

extensor digiti minimi OINA

A

Action: Extend the pinky at MCP and IP joints

Origin: lateral epicondyle

Insertion: extensor expansion of 5th digit

Nerve: Radial Nerve C7 and C8

20
Q

extensor carpi ulnaris OINA

A

Action: extend the wrist and ulnar deviation

Origin: lateral epicondyle

Insertion: base of 5th metacarpal

Nerve: radial nerve C7 and C8

21
Q

supinator OINA

A

Action: supinates the forearm

Origin: lateral epicondyle of humerus, radial collateral and annular ligaments

Insertion: lateral radius

Nerve: radial (PIN) C7 and C8

22
Q

extensor indicis OINA

A

Action: extend the second finger and assist in extension of wrist

Origin: Posterior distal ulna and interosseus membrane

Insertion: extensor expansion of 2nd digit

Nerve: Radial (PIN) C7 and C8

23
Q

abductor pollicis longus OINA

A

Action: radially abduct the thumb and extend the thumb

Origin: posterior proximal ulna, radius, and interosseus membrane

Insertion: Base of 1st metacarpal

Nerve: Radial (PIN) C7 and C8

24
Q

extensor pollicis brevis and longus OINA

A

Action: extend the thumb (IP joint) extend the thumb (MCP and CMC joints)

Origin: L- posterior ulna and interosseus membrane
B- posterior radius and interosseus membrane

Insertion: L- base of distal phalanx of thumb
B- base of proximal phalanx of thumb

Nerve: Radial (PIN) C7 and C8

25
Q

biceps brachii OINA

A

Action: supinates forearm, flexes forearm

Origin: short head- coracoid process
long head- supraglenoid tubercle

Insertion: radial tuberosity and fascia via bicipital aponeurosis

Nerve: musculocutaneous nerve (C5, C6, C7)

26
Q

coracobrachialis OINA

A

Action: flexes the arm, adducts the arm

Origin: coracoid process

Insertion: medial surface of humerus

Nerve: musculocutaneous nerve (C5, C6, C7)

27
Q

brachialis OINA

A

Action: flexes the elbow in ALL POSITIONS

Origin: anterior surface of humerus

Insertion: Ulnar Tuberosity and coronoid process of ulna

Nerve: musculocutaneous nerve (C5 and C6) and small branch from radial (C5 and C7)

28
Q

brachioradialis OINA

A

Action: Flex the elbow in midpronated position
Assists in pronation and supination

Origin: lateral supracondylar ridge of humerus

Insertion: lateral surface o distal end of radius to styloid process

Nerve: Radial nerve (C5, C6, C7)

29
Q

triceps brachii OINA

A

Action: MAIN extensor of forearm/ elbow
long head resists dislocation of humerus during adduction

Origin: Long head- infraglenoid tubercle
Medial head- posterior humerus, superior to radial groove
Short Head- posterior humerus, inferior to radial groove

Insertion: olecranon of ulna

Nerve: Radial Nerve (C6, C7, C8)

30
Q

anconeous OINA

A

Action: assists triceps in extending forearm
stabilize elbow joint
may abduct ulna during pronation

Origin: lateral epicondyle

Insertion: Lateral olecranon

Nerve: Radial Nerve C7, C8, T1

31
Q

pronator teres OINA

A

Action: pronate the forearm, assist in flexing the elbow

Origin: medial epicondyle of humerus and coronoid process

Insertion: lateral surface of radius

Nerve: Median nerve (C6 and C7)

human gross anatomy (12 decks)

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