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57 Cards in this Set

  • Front
  • Back
Pectoralis major
Innervation: Lateral & medial pectoral nerves

Action:
(1) Adducts humerus
(2) Medially rotates humerus
Pectoralis minor
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
Subclavius
Innervation: Nerve to subclavius

Action:
(1) Anchors & depresses clavicle
Serratus anterior
Innervation: Long thoracic nerve

Action:
(1) Protracts scapula & holds it against thoracic wall
(2) Rotates scapula upward
Trapezius
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
Latissiums dorsi
Innervation: Thoracodorsal nerve

Action:
(1) Adducts humerus
(2) Medially rotates humerus
(3) Extends humerus
(4) Raises body toward arms during climbing
Levator scapulae
Innervation: Cervical nerves & dorsal scapular nerve (occasionally)

Action:
(1) Elevates scapula
Rhomboid minor & major
Innervation: Dorsal scapular nerve

Action:
(1) Retract scapula
Deltoid
Innervation: Axillary nerve

Action:
(1) Abducts arm between 15-90°
Supraspinatus
Innervation: Suprascapular nerve

Action:
(1) Abducts arm initial 15°
Infraspinatus
Innervation: Suprascapular nerve

Action:
(1) Laterally rotates arm
Teres minor
Innervation: Axillary nerve

Action:
(1) Laterally rotates arm
Teres major
Innervation: Lower subscapular nerve

Action:
(1) Adducts arm
(2) Medially rotates arm
Subscapularis
Innervation: Upper & lower subscapular nerves

Action:
(1) Medially rotates arm
(2) Adducts arm
Biceps brachii
Innervation: Musculocutaneous nerve

Action:
(1) Main flexor of forearm in supinated position
(2) Supinates forearm
Brachialis
Innervation: Musculocutaneous nerve

Action:
(1) Flexes forearm in all positions
Coracobrachialis
Innervation: Musculocutaneous

Action:
(1) Flex arm
(2) Adducts arm
Triceps brachii
Innervation: Radial nerve

Action:
(1) Chief extensor of forearm
Anconeus
Innervation: Radial nerve

Action:
(1) Assists triceps in extending forearm
(2) Stabilizes elbow joint
Pronator teres
Innervation: Median nerve

Action:
(1) Pronates forearm (at elbow)
(2) Flexes forearm (at elbow)
Flexor carpi radialis
Innervation: Median nerve

Action:
(1) Flexes hand (at wrist)
(2) Abducts hand (at wrist)
Palmaris longus
Innervation: Median nerve

Action:
(1) Tenses palmar aponeurosis
(2) Flexes hand (at wrist)
Flexor carpi ulnaris
Innervation: Ulnar nerve

Action:
(1) Flexes had (at wrist)
(2) Adducts had (at wrist)
Flexor digitorum superficialis
Innervation: Median nerve

Action:
(1) Flexes middle phalanges of digits 2-5 at the proximal interphalangeal joints
Flexor digitorum profundus
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
Flexor pollicis longus
Innervation: Anterior interosseous nerve (from median nerve)

Action:
(1) Flexes phalanges of 1st digit (thumb)
Pronator quadratus
Innervation: Anterior interosseous nerve (from median nerve)

Action:
(1) Pronates forearm
Brachioradials
Innervation: Radial nerve

Action:
(1) Main flexor of the arm when the forearm is in midpronated position
Extensor carpi radialis longus
Innervation: Radial nerve

Action:
(1) Extend hand (at wrist)
(2) Abduct hand (at wrist)
Extensor carpi radialis longus
Innervation: Radial nerve (deep branch)

Action:
(1) Extend hand (at wrist)
(2) Abduct hand (at wrist)
Extensor digitorum
Innervation: Posterior interosseous nerve (continuation of deep branch of radial nerve)

Action:
(1) Extends digits 2-5
Extensor digiti minimi
Innervation: Posterior interosseous nerve (continuation of deep branch of radial nerve)

Action:
(1) Extends 5th digit (pinky)
Extensor carpi ulnaris
Innervation: Posterior interosseous nerve (continuation of deep branch of radial nerve)

Action:
(1) Extends hand (at wrist)
(2) Adducts hand (at wrist)
Supinator
Innervation: Radial nerve (deep branch)

Action:
(1) Supinates forearm
Abductor pollicis longus
Innervation: Posterior interosseous nerve (continuation of deep branch of radial nerve)

Action:
(1) Abducts thumb
(2) Extends thumb at carpometacarpal joint
Extensor pollicis longus
Innervation: Posterior interosseous nerve (continuation of deep branch of radial nerve)

Action:
(1) Extends distal phalanx of thumb
(2) Extends metacarpophalangeal & carpometacarpal joints
Extensor pollicis brevis
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
Extensor indicis
Innervation: Posterior interosseous nerve (continuation of deep branch of radial nerve)

Action:
(1) Extends 2nd digit (index finger)
Opponens pollicis
Innervation: Medial nerve (recurrent branch)

Action:
(1) Oppose thumb by drawing 1st metacarpal medially to center of palm & rotates it medially
Abductor pollicis brevis
Innervation: Medial nerve (recurrent branch)

Action:
(1) Abducts thumb
(2) Helps oppose thumb
Flexor pollicis brevis
Innervation: Medial nerve (recurrent branch)

Action:
(1) Flexes thumb
Adductor pollicis
Innervation: Ulnar nerve (deep branch)

Action:
(1) Adducts thumb toward lateral border of palm
Aductor digiti minimi
Innervation: Ulnar nerve (deep branch)

Action:
(1) Abducts 5th digit (pinky)
Flexor digiti minimi
Innervation: Ulnar nerve (deep branch)

Action:
(1) Flexes proximal phalanx of 5th digit (pinky)
Opponens digiti minimi
Innervation: Ulnar nerve (deep branch)

Action:
(1) Opposes 5th digit (pinky) by drawing the 5th metacarpal anterior & rotating it
Lumbricals
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
Dorsal interossei
Innervation: Ulnar nerve (deep branch)

Action:
(1) Abduct digits 2-4 from axial line
Palmar interossei
Innervation: Ulnar nerve (deep branch)

Action:
(1) Adduct digits 2, 3, & 5 toward axial line
Splenius (cervicis & capitis)
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
Iliocostalis
Innervation: Dorsal rami of spinal nerves

Grouping: Intermediate layer (erector spinae group) most lateral muscle in intermediate layer

Action:
(1) Extend vertebral column
Longissimus
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
Spinalis
Innervation: Dorsal rami of spinal nerves

Grouping: Intermediate layer (erector spinae group) most medial muscle in intermediate layer

Action:
(1) Extend vertebral column
Semispinalis
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
Multifidus
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
Rotatores
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
Interspinales
Innervation: Dorsal rami of spinal nerves

Grouping: Deep layer (transversospinalis group)
Intertransversarii
Innervation: Dorsal rami of spinal nerves

Grouping: Deep layer (transversospinalis group)