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Muscles Checklist 2
Origin, Insertion, Action, Innervation of Muscles
| Muscle | Origin | Insertion | Action | Innervation |
|---|---|---|---|---|
| Flexor carpi radialis | Medial epicondyle of humerus | 2nd or 3rd metacarpals | Flexes and abducts hand (radial deviation) at wrist joint | Median nerve |
| Palmaris longus | Medial epicondyle of humerus | Flexor retinaculum and palmer aponeurosis (deep fascia in center of palm) | Weakly flexes hand at wrist joint | Median nerve |
| Flexor carpi ulnaris | medial epicondyle of humerus | Pisiform, hamate, and base of 5th metacarpal | Flexes and adducts hand (ulnar deviation) at wrist joint | Ulnar nerve |
| Flexor digitorum superficialis | Medial epicondyle of humerus, coronoid process of ulna, and ridge along lateral margin of anterior surface (anterior oblique line) of radius | Middle phalanx of each finger | Flexes middle phalanx of each finger at proximal interphalangeal joint, proximal phalanx of each finger at metacarpophalangeal joint, and hand at wrist joint | Median nerve |
| Flexor pollicis longus | Anterior surface of radius and interosseous membrane | Base of distal phalanx of thumb | Flexes distal phalanx of thumb and interphalangeal joint | Median nerve |
| Flexor digitotum profundus | Anterior medial surface of body of ulna | Base of distal phalanx of each finger | Flexes distal and middle phalanges of each finger at interphalangeal joints, proximal phalanx of each finger at metacarpophalangeal joint, and hand at wrist | Median and ulnar nerves |
| Extensor carpi radialis | Lateral supracondylar ridge of humerus | 2nd metacarpal | Extends and abducts hand at wrist joint | Radial nerve |
| Extensor carpi radialis brevis | Lateral epicondyle of humerus | 3rd metacarpal | Extends and abducts hand at wrist joint | Radial nerve |
| Extensor digitorum | Lateral epicondyle of humerus | Distal and middle phalanges of each finger | Extends distal and middle phalanges of each finger joint, proximal phalanx of each finger at metacarpophalngeal joint, and hand at wrist | Radial nerve |
| Extensor digiti minimi | Lateral epicondyle of humerus | Tendon of extensor digitorum on 5th phalanx | Extends proximal phalanx of little finger at metacarpophalangeal joint and hand at wrist joint | Deep radial nerve |
| Extensor carpi ulnaris | Lateral epicondyle of humerus of humerus and posterior border of ulna | 5th metacarpal | Extends and adducts hand at wrist joint | Deep radial nerve |
| Abductor pollicis longus | Posterior surface of middle of radius and ulna and interosseous membrane | 1st metacarpal | Abducts and extends thumb at carpometacarpal joint and abducts hand at wrist joint | Deep radial nerve |
| Extensor pollicis brevis | Posterior surface of middle of radius and interosseous membrane | Base of proximal phalanx of thumb | Extends proximal phalanx of thumb at metacarpophalangeal joint, 1st metacarpal of thumb, at carpometacarpal joint, and hand at wrist joint | Deep radial nerve |
| Extensor pollicis longus | Posterior surface of middle of ulna and interosseous membrane | Base of distal phalanx of thumb | Extends distal phalanx of thumb at interphalangeal joint, 1st metacarpal of thumb at carpometacapal jointm and abducts hand at wrist joint | Deep radial nerve |
| Extensor indicis | Posterior surface of ulna | Tnedon of extensor digitorum of index finger | Extends distal and middle phalanges of index finger at interphalangeal joints, proximal phalanx of index finger at metacarpophalangeal joint, and hand at wrist joint | Deep radial nerve |
| Abductor pollicis brevis | Flexor retinaculum, scaphoid and trapezium | Lateral side of proximal phalanx of thumb | Abducts thumb at carpometacarpal joint | Median nerve |
| Opponens pollicis | Flexor reinaculum and trapezium | Lateral side of 1st metacarpal | Moves thumb across palm to meet little finger (opposition) at the carpometacarpal joint | Median nerve |
| Flexor pollicis brevis | Flexor retinaculum, trapezium, capitate, and trapezoid | Lateral side of proximal phalanx of thumb | Flexes thumb at carpometacarpal and metacarpophalangeal joints | Median and ulnar nerves |
| Adductor pollicis | Oblique head; capitate and 2nd and 3rd metacarpals; transeerse head; 3rd metacarpal | medial side of proximal phalanx of thumb by a tendon containing a sesamoid bone | Adducts thumb at carpometacarpal and meacarpophalangeal joints | Ulnar nerve |
| Flexor digiti minimi brevis | Flexor retinaculum and hamate | Medial side of proximal phalanx of little finger | Flexes little finger at carpometacarpal and metacarpophalangeal joints | Ulnar nerve |
| Opponens digiti minimi | Flexor retinaculum and hamate | medial side of 5th metacarpal (little finger) | Moves little finger acriss palm to meet thumb (opposition) at the carpometacarpal joint | Ulnar nerve |
| Lumbricals | lateral sides of tendons and flexor digitorum profundus of each finger | Lateral sides of tendons of extensor digitorum on proximal phalanges of each finger | Flex each finger at metacarpophalangeal joints and extend each finger at interphalangeal joints | Median and ulnar nerves |
| Palmar interossei | Sides of shafts of metacarpals of all digits (except middle one) | Sides of bases of proximal phalanges of all digits (except middle one) | Adduct each finger at metacarpophangeal joints; flex each finger at metacarpophalangeal joints | Ulnar nerve |
| Dorsal interossei | Adjacent sides of metacarpals | Proximal phalanx of each finger | Abduct fingers 2-4 at metacarpophalangeal joints; and extend each finger at interphalangeal joints | Ulnar nerve |
| Splenius capitus | Ligamentum nuchae and spinous processes of 7th cervical vertebra and 1st 3 or 4 thoracic vertebra | Occipital bone and mastiod process of temporal bone | Acting together extends head; acting singly laterally flex and rotate head to same side as contracting muscle | Middle cervical spinal nerves |
| Splenius cervicis | Spinous processes of 3rd - 6th thoracic vertebra | Transverse processes of 1st 2 or 4 vertebra | Acting together extend head; acting singly alterally flex and rotate head to same side as contracting muscle | Inferior cervical spinal nerves |
| iliocostalis cervicis | Superior 6 ribs | Transverse processes of 4th - 6th cervical vertebra | Together - extends and maintains posture of cervical region; singly - laterally flex vertebral column of cervical region | Cervical and thoracic spinal nerves |
| iliocostalis thoracis | Inferior 6 ribs | Superior 6 ribs | Together - extends and maintains posture of thoracic region; singly - laterally flex vertebral column of thoracic region | Thoracic spinal nerves |
| iliocostalis lumbarum | iliac crest | Inferior 6 ribs | Together - extends and maintains posture of lumbar region; singly - laterally flex vertebral column of lumbar region | Lumbar spinal nerves |
| Longissimus capitus | Tranverse processes of superior 4 thoracic vertebra and articular processes of inferior 4 cervical vertebra | mastiod process of temporal bone | Together - extend head; singly - rotate head to same side as contracting muscle | Middle and inferior cervical spinal nerves |
| Longissimus cervicis | Transverse processes of 4th and 5th thoracic vertebra | Transverse processes of 2nd - 6th cervical vertebra | Together - extend vertebral column of cervical region; singly - laterally flex vertebral column of cervical region | Cervical and superior thoracic spinal nerves |
| Longissimus thoracis | Transverse processes of lumbar vertebra | Transverse processes of all thoracic and superior lumbar vertebra and 9th and 10th ribs | Together - extend vertebral column of cervical region; singly - laterally flex vertebral column of lumbar region | Thoracic and lumbar spinal nerves |
| Spinalis capitus | Arises with semispinalis capitus | Occipital bone | Together - extend respective region of vertebral column | Cervical and thoracic spinal nerves |
| Spinalis cervicis | Ligamentum nuchae and spinous process of 7th cervical vertebra | Spinous process of axis | Together - extend cervical region of vertebral column | Inferior cervical and thoracic spinal nerves |
| Spinalis thoracis | Spinous processes of superior lumbar and inferior thoracic vertebrae | Spinous processes of superior thoracic vertebrae | Together - extend thoracic region of vertebral column | Thoracic spinal nerves |
| Semispinalis capitis | trnsverse processes of 1st 6 or 7 thoracic vertebra and 7th cervical vertebrae and articular processes of 4th, 5th, 6th cervical vertebrae | Occipital bone | Together - extend head; singly - rotate head to side opposite contractin muscle | Cervical and thoracic spinal nerves |
| Semispinalis cervicis | Transverse processes of superior 5 or 6 thoracic vertebrae | Spinous processes of 1st - 5th cervical vertebrae | Together - extends vertebral column of cervical region; singly - rotate head to side opposite contracting muscle | Cervical and thoracic spinal nerves |
| Semispinalis thoracic | Transverse processes of 6th - 10th thoracic vertebra | Spinous process of superior 4 thoracic and last 2 cervical vertebrae | Together - extends vertebral column of thoracic region; singly - rotate head to side opposite contracting muscle | Thoracic spinal nerves |
| Multifidus | Sacrum, ilium, transverse processes of lumbar, thoracic, and inferior 4 cervical vertebrae | Spinous process of a more superior vertebrae | Together - extend vertebral column; singly - laterally flex vertbral column and rotate head to opposite side of contracting muscle | Cervical, thoracic, and lumbar nerves |
| Rotatores | Transverse processes of all vertebrae | Spinous process of vertebraw superior of the one of origin | Together - extend vertebral column; singly - rotate vertebral column to opposite contracting muscle | Cervical, thoracic, and lumbar nerves |
| Interspinales | Superior surface of all spinous processes | Inferior surface of spinous process of vertebra and superior to the one of origin | Together - extend vertebral column; singly - stabilize vertebral column during movement | Cervical, thoracic, and lumbar nerves |
| Intertranversarii | Transverse processes of all vertebrae | Transverse process of vertebra superior to the one of origin | Together - extend vertebral column; singly - stabilize vertebral column during movement | Cervical, thoracic, and lumbar |
| Anterior scalene | Transverse processes of 3rd - 6th cervical vertebrae | 1st rib | Together - right and left anterior scalene flex head and elevate 1st ribs during deep inhalation; singly - laterally flex head and rotate head to side opposite contracting muscle | Cervical spinal C5-C6 |
| Middle scalene | Transverse processes of inferior 6 cervical vertebrae | 1st rib | Together - flex head and elevate 1st ribs during deep inhalation; singly - laterally flex head and rotate head to side opposite contracting muscle | Cervical spinal C3-C8 |
| Posterior scalene | Tranverse processes of 4th - 6th cervical vertebrae | 2nd rib | Together - flex head and elevate 2nd ribs during deep inhalation; singly - laterally flex head and rotate head to side opposite contracting muscle | Cervical spinal C6-C8 |
Created by:
jujuskyyflower
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