Current Muscle Chart Flashcards
splenius capitis action
Bilaterally: extends head
Unilaterally: laterally flexes the neck and head, rotates head ipsilaterally
splenius origin
ligamentum nuchae and spinous process of C7-T6
splenius capitis origin
ligamentum nuchae and spinous process of C7-T4 vertebrae
splenius cervicis origin
Spinous process of T3-T6
trapezius origin
medial third of the superior nuchal line, external occipital protuberance, ligamentum nuchae, spinous processes of vertebrae C7-T12
lattisimus dorsi origin
vertebral spines from T7 to the sacrum, posterior third of the iliac crest, lower 3 or 4 ribs, sometimes from the inferior angle of the scapula
rhomboid major origin
spines of vertebrae T2-T5
rhomboid minor origin
inferior end of the ligamentum nuchae, spines of vertebrae C7 and T1
levator scapulae origin
transverse process of C1-C4 vertebra
splenius insertion
capitis: mastoid process & superior nuchal line ; cervicis: posterior tubercles of transverse process of C1-C3 vertebrae
splenius capitis insertion
mastoid process and superior nuchal line
splenius cervicis insertion
posterior tubercles of the transverse processes of C1-C3 vertebrae
trapezius insertion
lateral third of the clavicle, medial side of the acromion and the upper crest of the scapular spine, tubercle of the scapular spine
lattisimus dorsi insertion
floor of the intertubercular groove
rhomboid major insertion
medial border of the scapula inferior to the spine of the scapula
rhomboid minor insertion
medial border of the scapula at the root of the spine of the scapula
levator scapulae insertion
medial boder of scapula - spine to the superior angle
splenius action
head and neck Unilaterally: laterally flexes the neck and head, rotates head ipsilaterally
splenius cervicis action
Bilaterally: extends head Unilaterally: laterally flexes the neck and head, rotates head ipsilaterally
trapezius action
elevates (upper fibers) and depresses (lower fibers) the scapula ; rotates the scapula superiorly; retracts scapula
lattisimus dorsi action
extends the arm and rotates the arm medially
rhomboids action
retracts, elevates and rotates the scapula inferiorly
levator scapulae action
elevates scapula medially, inferiorly rotates glenoid cavity by rotating scapula
splenius (capitis and cervicis) innervation
dorsal primary rami of spinal nerves C2-C6
trapezius innervation
motor: spinal accessory (XI), proprioception: C3-C4
splenius (cervicis and capitis) artery
occipital a; deep cervical a.
trapezius artery
transverse cervical a.; posterior intercostal a.
lattisimus dorsi innervation
thoracodorsal nerve (C7,8) from the posterior cord of the brachial plexus
lattisimus dorsi artery
thoracodorsal a., dorsal perforating branches of 9th, 10th and 11th posterior intercostal, subcostal and first three lumbar arteries
rhomboids innervation
dorsal scapular nerve (C5)
rhomboids artery
dorsal scapular a.
levator scapulae innervation
dorsal scapular nerve (C5)
levator scapulae artery
dorsal scapular a.
erector spinae origin
iliac crest, sacrum, spinous processes of lower lumbar vertebrae and sacrum, supraspinous ligament, sacrospinous ligament
erector spinae actions
extends and laterally bends the trunk, neck, and head
erector spinae muscles
iliocostalis, longissimus, spinalis
erector spinae arteries
Cervical: occipital, deep cervical artery
Thoracic: posterior intercostal artery
Abdominal: subcostal, lumbar
Sacral: lateral sacral artery
spinalis origin
iliac crest, sacrum, spinous processes of lower lumbar vertebrae and sacrum, supraspinous ligament, sacrospinous ligament
spinalis insertion
spinous processes of superior vertebral levels (thoracic and midcervical), cranium
spinalis actions
extends and laterally bends trunk, neck, and head
spinalis innervation
dorsal primary rami of spinal nerves
spinalis cervical artery
occipital, deep cervical, vertebral
spinalis thoracic artery
posterior intercostal artery
spinalis abdominal artery
subcostal, lumbar
spinalis sacral artery
lateral sacral artery
longissimus origin
iliac crest, sacrum, spinous processes of lower lumbar vertebrae and sacrum, supraspinous ligament, sacrospinous ligament
longissimus insertion
transverse process of superior vertebral levels (thorcic and cervical) and mastoid process
longissimus actions
extends and laterally bends the trunk, neck, and head
longissimus innervation
dorsal primary rami of spinal nerves
longissimus cervical artery
occipital, deep cervical, vertebral
longissimus thoracic artery
posterior intercostal artery
longissimus abdominal artery
subcostal, lumbar
longissimus sacral artery
lateral sacral artery
iliocostalis origin
iliac crest, sacrum, spinous processes of lower lumbar vertebrae and sacrum, supraspinous ligament, sacrospinous ligament
iliocostal insertion
angles of the lower ribs, cervical transverse process
iliocostalis actions
extends and laterally bends the trunk and neck
iliocostalis innervation
dorsal primary rami of spinal nerves
iliocostalis cervical artery
occipital, deep, cervical, vertebral
iliocostalis thoracic artery
posterior intercostal artery
iliocostalis abdominal artery
subcostal, lumbar
iliocostalis sacral artery
lateral sacral artery
multifidus origin
sacrum, ilium, transverse processes of T1-T12 and articular processes of C4-7
multifidus insertion
spinous processes 2-4 vertebral levels superior to their origin
multifidus actions
extend and laterally bend trunk and neck, rotate contralaterally, stabilize spine
multifidus innervation
dorsal primary rami of spinal nerves C1-L5
multifidus cervical artery
occipital, deep cervical artery, and vertebral artery
multifidus thoracic artery
posterior intercostal artery, subcostal artery, lumbar artery
multifidus lumbar artery
lateral sacral artery
rotatores origin
transverse processes
rotatores insertion
long rotatores: spinous processes 2 vertebrae above origin; short rotatores: spinous processes 1 vertebrae above origin
rotatores actions
stabilize and extend spine: rotates the vertebral column contralaterally
rotatores innervation
dorsal primary rami of spinal nerves C1-L5
rotatores artery
supplied segmentally by: deep cervical artery, posterior intercostal artery, subcostal artery, lumbar artery
semispinalis origin
transverse processes of C7-T12
semispinalis insertion
capitis: back of skull between nuchal lines; cervicis and thoracis: spines 4-6 vertebrae above origin
semispinalis actions
extends the trunk and laterally bends the trunk, rotates the trunk to the opposite side
semispinalis innervation
dorsal primary rami of spinal nerves C1-T12
semispinalis cervical artery
occipital, deep cervical, and vertebral
semispinalis thoracic artery
posterior intercostal artery, subcostal artery
serratus posterior superior origin
nuchal ligament, spinous process of C7-T3 vertebra
serratus posterior superior insertion
superior borders of ribs 2-5
serratus posterior superior action
elevate ribs, proprioception
serratus posterior superior innervation
anterior primary rami
serratus posterior superior artery
posterior intercostal artery
serratus posterior inferior origin
spinous process of T11-L2 vertebra
serratus posterior inferior insertion
inferior borders of ribs 9-12
serratus posterior inferior action
depress ribs, proprioception
serratus posterior inferior innervation
anterior primary rami
serratus posterior inferior artery
posterior intercostal artery
superficial extrinsic muscles
trapezius, lattisimus dorsi, levator scapulae, rhomboids
intermediate extrinsic muscles
serratus posterior superior, serratus posterior anterior
superficial intrinsic muscles
splenius (capitis and cervicis)
intermediate intrinsic muscles
erector spinae- iliocostalis, longissimus, spinalis
deep intrinsic muscles
semispinales, multifidus, rotatores
