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Muscles Checklist 2

Origin, Insertion, Action, Innervation of Muscles

MuscleOriginInsertionActionInnervation
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