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Anatomy > Week 2: Attachments, Innervations, Actions > Flashcards

Week 2: Attachments, Innervations, Actions Flashcards

1
Q

Pectoralis Major (prox attach, distal, innervate, action)

A

Clavicular Head: anterior surface of clavicle
Sternocostal Head: anterior surface of sternum, superior 6 costal cartilages

Intertubercular sulcus/groove of humber

Lateral and Medial Pectoral Nerve

Together: adducts and medially rotates humerus
Acting alone: clavicular head flexes humerus and sternocostal head extends it from flexed position

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2
Q

Pectoralis Minor (prox attach, distal, innervate, action)

A

Ribs 3 → 5

Coracoid process of scapula

Medial Pectoral Nerve

Depresses and protracts scapula

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3
Q

Serratus Anterior (prox attach, distal, innervate, action)

A

Ribs 1 → 8

Medial border of scapula

Long Thoracic nerve

Protracts scapula, rotates scapula upward

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4
Q

Deltoid (prox attach, distal, innervate, action)

A

Lateral ⅓ of clavicle, acromion and spine of scapula

Deltoid tuberosity of humerus

Axillary Nerve

Anterior part: flexes and medially rotates arm
Middle part: abducts arm
Posterior part: extends and laterally rotates arm

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5
Q

Supraspinatus (prox attach, distal, innervate, action)

A

Supraspinous fossa of scapula

Greater tubercle of humerus

Suprascapular nerve

Initiates abduction of arm

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6
Q

Infraspinatus (prox attach, distal, innervate, action)

A

Infraspinous fossa of scapula

Greater tubercle of humerus

Suprascapular nerve

Laterally rotates arm

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7
Q

Teres Minor (prox attach, distal, innervate, action)

A

Lateral border of scapula

Greater tubercle of humerus

Axillary nerve

Laterally rotates arm

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8
Q

Teres Major (prox attach, distal, innervate, action)

A

Inferior angle of scapula

Intertubercular sulcus of humerus

Lower subscapular nerve

Extends, adducts, and medially rotates arm

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9
Q

Subscapularis (prox attach, distal, innervate, action)

A

Subscapular fossa

Lesser tubercle of humerus

Upper and lower subscapular nerves

Medially rotates arm, helps hold head of humerus in glenoid cavity

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10
Q

Triceps Brachii (prox attach, distal, innervate, action)

A

Long head: infraglenoid tubercle of scapula
Lateral head: posterior surface of humerus, superior to radial groove
Medial head: posterior surface of humerus, inferior to glenoid cavity

Olecranon of ulna

Radial nerve

Extends the forearm

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11
Q

Anconeus (prox attach, distal, innervate, action)

A

Lateral epicondyle of humerus

Lateral surface of olecranon

Radial nerve

Assists triceps in extending forearm

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12
Q

Biceps Brachii (prox attach, distal, innervate, action)

A

Short head: coracoid process of scapula
Long head: supraglenoid tubercle of scapula

Tuberosity of radius

Musculocutaneous nerve (C5,6,7)

Supinates forearm and when supine, flexes the forearm/elbow

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13
Q

Coracobrachalis (prox attach, distal, innervate, action)

A

Coracoid process of scapula

Middle third of humerus

Musculocutaneous nerve (C5,6,7)

Flexes and adducts the arm and shoulder

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14
Q

Brachialis (prox attach, distal, innervate, action)

A

Distal anterior humerus

Coronoid process and tuberosity ulna

Musculocutaneous nerve (C5,6)

Flexes forearm/elbow in all positions

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15
Q

Pronator Teres (prox attach, distal, innervate, action)

A

Coronoid process of ulna and supraepicondylar ridge of humerus

Lateral radius

Median nerve

Pronates forearm

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16
Q

Flexor Carpi Radialis (FCR) (prox attach, distal, innervate, action)

A

Medial epicondyle of humerus

2nd metacarpal

Median nerve

Flexes and abducts wrist

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17
Q

Palmaris Longus (prox attach, distal, innervate, action)

A

Medial epicondyle of humerus

Flexor retinaculum and palmar aponeurosis

Median nerve

Weakly flexes wrist and tenses palmar aponeurosis

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18
Q

Flexor Carpi Ulnaris (prox attach, distal, innervate, action)

A

Medial epicondyle of humerus

Pisiform, hook of hamate, 5th metacarpal

Ulnar nerve

Flexes and adducts wrist

19
Q

Flexor Digitorum Superficialis (prox attach, distal, innervate, action)

A

Medial epicondyle of humerus

Middle phalanges of 2→5 digits

Median nerve

Flexes wrist and phalanges 2 → 5 at PIP and MCP joint

20
Q

Flexor Digitorum Profundus

A

Anterior ulna and interosseous membrane

Distal phalanges of 2 → 5 digits

Ulnar nerve: medial 1 ½ phalanges
Median nerve: lateral 2 ½ phalanges

Flexes wrist and phalanges 2 → 5 at MCP, PIP, and DIP

21
Q

Flexor Pollicis Longus

A

Anterior ulna and interosseous membrane

Distal phalanx of thumb

Median nerve

Flexes CMC, MCP, and IP joints of 1st digit (thumb)

22
Q

Pronator Quadratus

A

Distal ulna

Distal radius

Median nerve

Pronates wrist

23
Q

Brachioradialis

A

Supra-epicondylar ridge of humerus

Distal end of radius

Radial nerve

Maximal flexion of forearm (elbow joint) in mid-pronated position

24
Q

Extensor Carpi Radialis Longus

A

Supra-epicondylar ridge of humerus

Base of 2nd metacarpal

Radial nerve

Extends and abduct hand at the wrist joint

25
Q

Extensor Carpi Radialis Brevis

A

Lateral epicondyle of humerus

Base of 3rd metacarpal

Radial nerve

Extends and abduct hand at the wrist joint

26
Q

Extensor digitorum

A

Lateral epicondyle of humerus

Extensor expansions of medial 4 digits

Radial nerve

Extends wrist and medial 4 digits primarily at MCP joint, secondarily at PIP and DIP joints

27
Q

Extensor Digiti Minimi

A

Lateral epicondyle of humerus

Extensor expansion of 5th digit

Radial nerve

Extends 5th digit primarily at MCP, secondarily at PIP and DIP joints

28
Q

Extensor Carpi Ulnaris

A

Lateral epicondyle of humerus; posterior ulna

Base of 5th metacarpal

Radial nerve

Extends and adducts hand at wrist joint

29
Q

Supinator

A

Lateral epicondyle of humerus

Proximal ⅓ of radius

Radial nerve

Supinates forearm

30
Q

Extensor Indicis

A

Ulna and interosseous membrane

Extensor expansion of 2nd digit

Radial nerve

Extends 2nd digit at MCP, PIP, and DIP

31
Q

Abductor Pollicis Longus (APL)

A

Ulna, radius, and interosseous membrane

Base of 1st metacarpal

Radial nerve

Abducts thumb at CMC joint

32
Q

Extensor Pollicis Longus (EPL)

A

Ulna and interosseous membrane

Distal phalanx of thumb

Radial nerve

Extends thumb at CMC, MCP, and IP joints

33
Q

Extensor Pollicis Brevis (EPB)

A

Radius and interosseous membrane

Proximal phalanx of thumb

Radial nerve

Extends thumb at CMC and MCP joints

34
Q

Opponens Pollicis
(3rd layer)

A

Flexor retinaculum; scaphoid and trapezium

1st metacarpal

Recurrent branch of median nerve

Opposes thumb at CMC joint

35
Q

Abductor Pollicis Brevis
(1st layer)

A

Flexor retinaculum; scaphoid and trapezium

Proximal phalanx of thumb

Recurrent branch of median nerve

Abducts thumb at CMC joint

36
Q

Flexor Pollicis Brevis
(1st layer)

A

Flexor retinaculum; scaphoid and trapezium

Proximal phalanx of thumb

Recurrent branch of median nerve

Flexes thumb at CMC and MCP joint

37
Q

Adductor Pollicis
(3rd layer)

A

Bases of 2nd and 3rd metacarpals, capitate

Proximal phalanx of thumb

Ulnar Nerve

Adducts thumb at CMC joint

38
Q

Abductor Digiti Minimi

A

Pisiform

Proximal 5th digit

Ulnar nerve

Abducts 5th digit at MCP

39
Q

Flexor Digiti Minimi

A

Hamate and flexor retinaculum

Proximal 5th digit

Ulnar nerve

Flexes 5th digit at MCP

40
Q

Opponens Digiti Minimi

A

Hamate and flexor retinaculum

5th metacarpal

Ulnar nerve

Opposes 5th digit at CMC with thumb

41
Q

1st and 2nd Lumbricals

A

Tendons of flexor digitorum profundus

Extensor expansions of 2 → 5 digits

Median nerve

Flex MCP joints; extends PIP and DIP joints of 2 → 5 digits

42
Q

3rd and 4th Lumbricals

A

Tendons of flexor digitorum profundus

Extensor expansions of 2 → 5 digits

Ulnar nerve

Flex MCP joints; extends PIP and DIP joints of 2 → 5 digits

43
Q

Dorsal Interossei 1st → 4th

A

Adjacent sides of two metacarpals

Bases of proximal phalanges; extensor expansions of 2nd → 4th digits

Ulnar nerve

Abducts 2nd → 4th digits; act with lumbricals in flexing MCP joints and extending PIP and DIP joints

44
Q

Palmar Interossei, 1st → 3rd

A

Palmar surfaces of 2nd, 4th, and 5th metacarpals

Bases of proximal phalanges; extensor expansions of 2nd, 4th, and 5th digits

Ulnar nerve

Adducts 2nd, 4th, and 5th; assist lumbricals in flexing MCP joints and extending PIP and DIP joints

Anatomy (4 decks)

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