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57 Cards in this Set
- Front
- Back
Pectoralis major
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Innervation: Lateral & medial pectoral nerves
Action: (1) Adducts humerus (2) Medially rotates humerus |
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Pectoralis minor
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Innervation: Medial pectoral nerve (mainly), Also may have some innervation by lateral pectoral nerve
Action: (1) Stabilizes scapula by drawing it inferiorly & anteriorly against thoracic wall |
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Subclavius
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Innervation: Nerve to subclavius
Action: (1) Anchors & depresses clavicle |
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Serratus anterior
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Innervation: Long thoracic nerve
Action: (1) Protracts scapula & holds it against thoracic wall (2) Rotates scapula upward |
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Trapezius
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Innervation: Spinal accessory nerve (CN XI)
Action: (1) Adduct (retract) scapula (2) Upper portion elevates (shrugging shoulders (3) Rotate glenoid cavity of scapula upwards in order to abduct humerus above 90 degrees |
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Latissiums dorsi
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Innervation: Thoracodorsal nerve
Action: (1) Adducts humerus (2) Medially rotates humerus (3) Extends humerus (4) Raises body toward arms during climbing |
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Levator scapulae
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Innervation: Cervical nerves & dorsal scapular nerve (occasionally)
Action: (1) Elevates scapula |
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Rhomboid minor & major
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Innervation: Dorsal scapular nerve
Action: (1) Retract scapula |
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Deltoid
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Innervation: Axillary nerve
Action: (1) Abducts arm between 15-90° |
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Supraspinatus
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Innervation: Suprascapular nerve
Action: (1) Abducts arm initial 15° |
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Infraspinatus
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Innervation: Suprascapular nerve
Action: (1) Laterally rotates arm |
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Teres minor
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Innervation: Axillary nerve
Action: (1) Laterally rotates arm |
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Teres major
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Innervation: Lower subscapular nerve
Action: (1) Adducts arm (2) Medially rotates arm |
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Subscapularis
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Innervation: Upper & lower subscapular nerves
Action: (1) Medially rotates arm (2) Adducts arm |
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Biceps brachii
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Innervation: Musculocutaneous nerve
Action: (1) Main flexor of forearm in supinated position (2) Supinates forearm |
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Brachialis
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Innervation: Musculocutaneous nerve
Action: (1) Flexes forearm in all positions |
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Coracobrachialis
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Innervation: Musculocutaneous
Action: (1) Flex arm (2) Adducts arm |
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Triceps brachii
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Innervation: Radial nerve
Action: (1) Chief extensor of forearm |
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Anconeus
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Innervation: Radial nerve
Action: (1) Assists triceps in extending forearm (2) Stabilizes elbow joint |
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Pronator teres
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Innervation: Median nerve
Action: (1) Pronates forearm (at elbow) (2) Flexes forearm (at elbow) |
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Flexor carpi radialis
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Innervation: Median nerve
Action: (1) Flexes hand (at wrist) (2) Abducts hand (at wrist) |
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Palmaris longus
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Innervation: Median nerve
Action: (1) Tenses palmar aponeurosis (2) Flexes hand (at wrist) |
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Flexor carpi ulnaris
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Innervation: Ulnar nerve
Action: (1) Flexes had (at wrist) (2) Adducts had (at wrist) |
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Flexor digitorum superficialis
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Innervation: Median nerve
Action: (1) Flexes middle phalanges of digits 2-5 at the proximal interphalangeal joints |
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Flexor digitorum profundus
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Innervation:
(1) Lateral part: Anterior interosseous nerve (from median nerve) (2) Medial part: Ulnar nerve Action: (1) Flexes distal phalanges of digits 2-5 at the distal interphalangeal joints |
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Flexor pollicis longus
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Innervation: Anterior interosseous nerve (from median nerve)
Action: (1) Flexes phalanges of 1st digit (thumb) |
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Pronator quadratus
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Innervation: Anterior interosseous nerve (from median nerve)
Action: (1) Pronates forearm |
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Brachioradials
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Innervation: Radial nerve
Action: (1) Main flexor of the arm when the forearm is in midpronated position |
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Extensor carpi radialis longus
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Innervation: Radial nerve
Action: (1) Extend hand (at wrist) (2) Abduct hand (at wrist) |
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Extensor carpi radialis longus
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Innervation: Radial nerve (deep branch)
Action: (1) Extend hand (at wrist) (2) Abduct hand (at wrist) |
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Extensor digitorum
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Innervation: Posterior interosseous nerve (continuation of deep branch of radial nerve)
Action: (1) Extends digits 2-5 |
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Extensor digiti minimi
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Innervation: Posterior interosseous nerve (continuation of deep branch of radial nerve)
Action: (1) Extends 5th digit (pinky) |
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Extensor carpi ulnaris
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Innervation: Posterior interosseous nerve (continuation of deep branch of radial nerve)
Action: (1) Extends hand (at wrist) (2) Adducts hand (at wrist) |
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Supinator
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Innervation: Radial nerve (deep branch)
Action: (1) Supinates forearm |
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Abductor pollicis longus
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Innervation: Posterior interosseous nerve (continuation of deep branch of radial nerve)
Action: (1) Abducts thumb (2) Extends thumb at carpometacarpal joint |
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Extensor pollicis longus
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Innervation: Posterior interosseous nerve (continuation of deep branch of radial nerve)
Action: (1) Extends distal phalanx of thumb (2) Extends metacarpophalangeal & carpometacarpal joints |
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Extensor pollicis brevis
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Innervation: Posterior interosseous nerve (continuation of deep branch of radial nerve)
Action: (1)Extends proximal phalanx of thum at metacarpophalangeal joint (2) Extends carpometacarpal joint |
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Extensor indicis
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Innervation: Posterior interosseous nerve (continuation of deep branch of radial nerve)
Action: (1) Extends 2nd digit (index finger) |
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Opponens pollicis
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Innervation: Medial nerve (recurrent branch)
Action: (1) Oppose thumb by drawing 1st metacarpal medially to center of palm & rotates it medially |
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Abductor pollicis brevis
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Innervation: Medial nerve (recurrent branch)
Action: (1) Abducts thumb (2) Helps oppose thumb |
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Flexor pollicis brevis
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Innervation: Medial nerve (recurrent branch)
Action: (1) Flexes thumb |
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Adductor pollicis
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Innervation: Ulnar nerve (deep branch)
Action: (1) Adducts thumb toward lateral border of palm |
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Aductor digiti minimi
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Innervation: Ulnar nerve (deep branch)
Action: (1) Abducts 5th digit (pinky) |
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Flexor digiti minimi
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Innervation: Ulnar nerve (deep branch)
Action: (1) Flexes proximal phalanx of 5th digit (pinky) |
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Opponens digiti minimi
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Innervation: Ulnar nerve (deep branch)
Action: (1) Opposes 5th digit (pinky) by drawing the 5th metacarpal anterior & rotating it |
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Lumbricals
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Innervation:
(1) Lumbricals 1 & 2: Median nerve (2) Lumbricals 3 & 4: Ulnar nerve (deep branch) Action: (1) Flex metacarpophalangeal joints of digits 2-5 (2) Extends interphalangeal joints of digits 2-5 |
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Dorsal interossei
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Innervation: Ulnar nerve (deep branch)
Action: (1) Abduct digits 2-4 from axial line |
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Palmar interossei
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Innervation: Ulnar nerve (deep branch)
Action: (1) Adduct digits 2, 3, & 5 toward axial line |
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Splenius (cervicis & capitis)
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Innervation: Dorsal rami of spinal nerves
Group: Superficial layer of intrinsic back muscle Action: (1) Unilateral contraction rotates head & neck to same side (2) Bilateral contraction extends neck |
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Iliocostalis
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Innervation: Dorsal rami of spinal nerves
Grouping: Intermediate layer (erector spinae group) most lateral muscle in intermediate layer Action: (1) Extend vertebral column |
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Longissimus
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Innervation: Dorsal rami of spinal nerves
Grouping: Intermediate layer (erector spinae group) lies between iliocostalis and spinalis in intermediate layer Action: (1) Extend vertebral column |
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Spinalis
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Innervation: Dorsal rami of spinal nerves
Grouping: Intermediate layer (erector spinae group) most medial muscle in intermediate layer Action: (1) Extend vertebral column |
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Semispinalis
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Innervation: Dorsal rami of spinal nerves
Grouping: Deep layer (transversospinalis group) superomedial orientation from transverse to spinous processes (spans 4-6 spinal segments) Action: (1) Unilateral contraction rotates vertebral column to opposite side (2) Bilateral contraction extends vertebral column |
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Multifidus
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Innervation: Dorsal rami of spinal nerves
Grouping: Deep layer (transversospinalis group) superomedial orientation from transverse to spinous processes (spans 2-4 spinal segments) Action: (1) Unilateral contraction rotates vertebral column to opposite side (2) Bilateral contraction extends vertebral column |
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Rotatores
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Innervation: Dorsal rami of spinal nerves
Grouping: Deep layer (transversospinalis group) superomedial orientation from transverse to spinous processes (spans 1-2 spinal segments) Action: (1) Unilateral contraction rotates vertebral column to opposite side (2) Bilateral contraction extends vertebral column |
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Interspinales
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Innervation: Dorsal rami of spinal nerves
Grouping: Deep layer (transversospinalis group) |
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Intertransversarii
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Innervation: Dorsal rami of spinal nerves
Grouping: Deep layer (transversospinalis group) |