Muscle Chart FIT

origin of trapezius

medial third of the superior nuchal line, external occipital protuberance, ligamentum nuchae, spinous processes of vertebrae C7-T12

insertion of the trapezius

lateral third of the clavicle, medial side of the acromion and the upper crest of the scapular spine

actions of the trapezius

Superior fibers elevate the scapula; lower fibers depress the scapula; middle part retracts scapula; upper and lower fibers work together to rotate the glenoid surface superiorly (arm up movement)

innervation of the trapezius

motor: spinal accessory (XI), proprioception: C3-C4

artery of the trapezius

transverse cervical a.; dorsal scapular a., posterior intercostal a.

origin of the latissimus dorsi

vertebral spines from T6- 12, thoracolumbar fascia; posterior third of the iliac crest, lower 3 or 4 ribs, sometimes from the inferior angle of the scapula

insertion of the latissimus dorsi

floor of the intertubercular groove on the humerus

actions of the latissimus dorsi

extends, adducts, and medially rotates the arm

innervation of the latissimus dorsi

thoracodorsal nerve (C6,7,8)

artery of the latissimus dorsi

thoracodorsal a., dorsal perforating branches of 9th, 10th and 11th posterior intercostal, subcostal and first three lumbar arteries

origin of the rhomboid major

spines of vertebrae T2-T5

insertion of the rhomboid major

medial border of the scapula inferior to the spine of the scapula

actions of the rhomboid major

retracts scapula and rotates the scapula inferiorly

innervation of the rhomboid major

dorsal scapular nerve (C4,C5)

artery of the rhomboid major

dorsal scapular a.

origin of the rhomboid minor

inferior end of the ligamentum nuchae, spines of vertebrae C7 and T1

insertion of the rhomboid minor

medial border of the scapula at the root of the spine of the scapula

actions of the rhomboid minor

retracts scapula and rotates the scapula inferiorly

innervation of the rhomboid minor

dorsal scapular nerve (C4,C5)

artery of the rhomboid minor

dorsal scapular a.

origin of the levator scapulae

posterior tubercles of C1-C4 vertebra

insertion of the levator scapulae

medial border of scapula-spine to the superior angle

actions of the levator scapulae

elevates medial part of scapula, which causes an inferior rotation of the glenoid cavity

innervation of the levator scapulae

dorsal scapular nerve (C4,C5); anterior primary rami of C3 & C4

artery of the levator scapulae

dorsal scapular a.

origin of the serratus posterior superior

nuchal ligament, spinous process of C7-T3 vertebrae

insertion of the serratus posterior superior

superior borders of ribs 2-5

actions of the serratus posterior superior

elevate ribs, proprioception

innervation of the serratus posterior superior

anterior primary rami (first four intercostal nerves)

artery of the serratus posterior superior

posterior intercostal a.

origin of the serratus posterior inferior

spinous process of T11-L2 vertebra

insertion of the serratus posterior inferior

inferior borders of ribs 9-12

actions of the serratus posterior inferior

depress ribs, proprioception

innervation of the serratus posterior inferior

anterior primary rami (last four intercostal nerves)

artery of the serratus posterior inferior

posterior intercostal a.

origin of the splenius

ligamentum nuchae and spinous process of C7-T6

insertion of the splenius capitis

mastoid process and superior nuchal line

insertion of the splenius cervicis

posterior tubercles of transverse process of C1-C3 vertebrae

actions of the splenius

bilateral contraction: extends head and neck, unilateral contraction: laterally flexes the neck and head, rotates head ipsilaterally

innervation of the splenius

dorsal primary rami of spinal nerves C2-C6

artery of the splenius

occipital a.; deep cervical a.

origin of the spinalis

iliac crest, sacrum, spinous processes of lower lumbar vertebrae and sacrum, supraspinous ligament, sacrospinous ligament

insertion of the spinalis

spinous processes of superior vertebral levels (thoracic and midcervical), cranium

actions of the spinalis

part of erector spinae group: bilateral contraction extends back and head; unilateral contraction laterally bends trunk and neck

innervation of the spinalis

dorsal primary rami of spinal nerves

artery of the spinalis

cervical: occipital, deep cervical, vertebral; thoracic: posterior intercostal a.; abdominal: subcostal, lumbar; sacral: lateral sacral a.

origin of the longissimus

iliac crest, sacrum, spinous processes of lower lumbar vertebrae and sacrum, supraspinous ligament, sacrospinous ligament

insertion of the longissimus

transverse process of superior vertebral levels (thoracic and cervical) and mastoid process

actions of the longissimus

part of erector spinae group: bilateral contraction extends back and head; unilateral contraction laterally bends trunk and neck

innervation of the longissimus

dorsal primary rami of spinal nerves

artery of the longissimus

cervical: occipital, deep cervical, vertebral; thoracic: posterior intercostal a.; abdominal: subcostal, lumbar; sacral: lateral sacral a.

origin of the iliocostalis

iliac crest, sacrum, spinous processes of lower lumbar vertebrae and sacrum, supraspinous ligament, sacrospinous ligament

insertion of the iliocostalis

angles of the lower ribs, cervical transverse process

actions of the iliocostalis

part of erector spinae group: bilateral contraction extends back and head; unilateral contraction laterally bends trunk and neck

innervation of the iliocostalis

dorsal primary rami of spinal nerves

artery of the iliocostalis

cervical: occipital, deep cervical, vertebral; thoracic: posterior intercostal a.; abdominal: subcostal, lumbar; sacral: lateral sacral a.

origin of the semispinalis

transverse processes of C4-T12

insertion of the semispinalis capitis

back of skull between nuchal lines

insertion of the semispinalis cervicis and thoracis

spines 4-6 vertebrae above origin

actions of the semispinalis

bilateral contraction extends the trunk and neck; unilateral contraction rotates the trunk and head to the opposite side

innervation of the semispinalis

dorsal primary rami of spinal nerves

artery of semispinalis

supplied segmentally: cervical: occipital, deep cervical a. and vertebral a., thoracic: posterior intercostal a., subcostal a., lumbar: lumbar a.

origin of the multifidus

sacrum, ilium, transverse processes of T1-T12 and articular processes of C4-C7

insertion of the multifidus

spinous processes 2-4 vertebral levels superior to their origin

actions of the multifidus

bilateral contraction extends the trunk; unilateral contraction rotates the trunk to the opposite side, stabilizes spine

innervation of the multifidus

dorsal primary rami of spinal nerves

artery of the multifidus

supplied segmentally: cervical: occipital, deep cervical a. and vertebral a., thoracic: posterior intercostal a., subcostal a., lumbar a. lumbar: lateral sacral a.

origin of the rotatores

transverse processes

insertion of the rotatores longus

spinous processes 2 vertebrae above origin

insertion of the rotatores brevis

spinous processes 1 vertebrae above origin

actions of the rotatores

bilateral contraction: stabilize and extend spine; unilateral contraction: rotate the vertebral column contralaterally

innervation of the rotatores

dorsal primary rami of spinal nerves

artery of the rotatores

supplied segmentally: cervical: deep cervical a., thoracic: posterior intercostal a., subcostal a., lumbar: lumbar a.

origin of the interspinales

superior border of spinous process

insertion of the interspinales

inferior border of spinous process above

actions of the interspinales

extend trunk and neck

innervation of the interspinales

dorsal primary rami of spinal nerves

artery of the interspinales

supplied segmentally: cervical: occipital, deep cervical a. and vertebral a., thoracic: posterior intercostal a., subcostal a., lumbar: lumbar a.

origin of the intertransversarii

transverse processes of cervical and lumbar vertebrae

insertion of the intertransversarii

transverse processes of adjacent vertebrae

actions of the intertransversarii

bilateral contraction: stabilize the vertebral column; unilateral contraction: laterally flex trunk and neck

innervation of the intertransversarii

cervical parts - ventral and dorsal primary rami; thoracic parts - dorsal primary rami of spinal nerves; lumbar parts - ventral and dorsal primary rami

artery of the intertransversarii

supplied segmentally: cervical: deep cervical a., thoracic: posterior intercostal a., lumbar: lateral lumbar a.

origin of the levatores costarum

transverse processes C7-T11

insertion of the levatores costarum

subadjacent ribs between tubercle and angle of ribs

actions of the levatores costarum

elevates the ribs, assists with respiration

innervation of the levatores costarum

dorsal primary rami of spinal nerves

artery of the levatores costarum

posterior intercostal a.

origin of the obliquus capitis inferior

spinous process of the axis

insertion of the obliquus capitis inferior

transverse process of atlas

actions of the obliquus capitis inferior

rotates the head to the same side

innervation of the obliquus capitis inferior

suboccipital nerve (dorsal primary ramus of C1)

artery of the obliquus capitis inferior

vertebral a., occipital a.

origin of the obliquus capitis superior

transverse process of atlas

insertion of the obliquus capitis superior

occipital bone above inferior nuchal line

actions of the oblquus capitis superior

extends and bends head laterally

innervation of the obliquus capitis superior

suboccipital nerve (dorsal primary ramus of C1)

artery of the obliquus capitis superior

vertebral a., occipital a.

origin of the rectus capitis posterior major

spinous process of axis