Back Musculature Flashcards
Splendid Cervicis Action
Bilaterally extends neck; unilaterally flexes and rotates neck to same side
Splenius cervicis innervation
Posterior rami of spinal nerves
Splenius capitis action
Bilaterally extends neck; unilaterally flexes and rotate neck to same side
Splenius capitis innervation
Posterior rami of spinal nerves
Iliocostalis (luborum, thoracic, cervicis) action
Bilaterally extend spine, (head); unilaterally flexes spine (and head) to same side
Iliocostalis (lumborum, thoracic, cervicis) innervation
Segmentally innervated by posterior rami of spinal nn.
Longissiumus (thoracis, cervicis, capitis) innervation
Segmentally innervated by posterior rami of spinal nn.
Longissiumus (thoracis, cervicis, capitis) action
Bilaterally extend spine, (head); Unilaterally flexes spine (and head) to same side
Spinalis (thoracis, cervicis) action
Bilaterally extend spine (head); unilaterally flexes spine (and head) to same side
Spinalis (thoracis, cervicis) innervation
Segmentally innervated by posterior rami of spinal nn.
Semi spinalis (thoracis, cervicis, capitis) action
Bilaterally extends spine; unilaterally flexes spine to same side and rotates to the opposite side
Semispinalis (thoracis, cervicis, capitis) innervation
Segmentally innervated by posterior rami of spinal nerves
Multifidus action
Bilaterally extends spine; unilaterally flexes spine to same side and rotates to opposite side
Multifidus innervation
Segmentally innervated by posterior rami of spinal nerves
Rotators (longus and brevis) action
Bilaterally extends spine; unilaterally flexes spine to same side and rotates to the opposite side
Rotatores (longus and brevis) innervation
Segmentally innervated by posterior rami of spinal nerves
Interspinales (cervicis, thoracis, lumborum) action
Assist in extension of spine
Interspinales (cervicis, thoracis, lumborum) innervation
Posterior rami of spinal nerves
Intertransversarii (cervicis, thoracis, lumborum) action
Bilaterally stabilizes spine; unilaterally assists in lateral flexion
Intertransversarii (cervicis, thoracis, lumborum) innervation
Anterior and posterior rami of spinal nerves
Levatores costarum (longus and brevis) action
Bilaterally elevates ribs and slightly extends thoracic spine; unilaterally flexes spine to same side and rotates it to the opposite side
Levatores costarum (longus and brevis) innervation
Posterior rami of spinal nerves
Trapezius action
Elevates, depresses, retracts scapula and rotates glenoid fossa superiority; steadies scapula to thoracic wall; unilaterally flexes to the same side
Trapezius innervation
Spinal accessory nerve/CN XI (motor), C3, C4 (pain and proprioception)
Latissimus Dorsi action
Extends, adducts, medially rotates shoulder; raises body toward arms during climbing
Latissimus dorsi innervation
Thoracodorsal nerve (C6-C8)