compartments and innervation Flashcards
superficial muscles of the back - extrinsic
- trapezius (most superficial)
- latissimus dorsi
- levator scapulae
- rhomboid major
- rhomboid minor
innervation of trapezius
acessory nerve and C3 and C4 spinal nerves
actions of trapezius
- elevates the scapula
- rotates the scapula
innervation of the latissimus dorsi
thoracodorsal nerve
action of the latissimus dorsi
extends, abducts, and medially rotates the upper limb
innervation of the levator scapulae
dorsal scapula nerve
actions of the levator scapulae
elevates the scapula
innervation of the rhomboid major
dorsal scapula nerve
actions of the rhomboid major
retracts and rotates scapula
innvervation of the rhomboid minor
dorsal scapula nerve
actions of the rhomboid minor
retracts and rotates the scapula
superficial muscles of the back - intrinsic
- splenius capitis
- splenius cervices
innervation of the splenius capitis
posterior rami of spinal nerves C3 and C4
action of splenius capitis
rotate head to the same side
innervation of splenius cervices
posterior rami of the lower cervical spinal nerves
actions of splenius cervices
rotate the head to the same side
- two splenius muscle work to extend
intermediate muscles of the back - intrinsic (erector spinae muscles)
- iliocostalis
- longissimus
- spinalis
innervation of the iliocostalis
posterior rami of the spinal nerves
actions of the iliocostalis
unilaterally flex the vertebral column and bilaterally to extend the vertebral column and head
innervation of longissimus
posterior rami of the spinal nerves
actions of the longissimus
unilaterally to laterally flex the spinal column and bilaterally to extend the vertebral column and head
innervation of the spinalis
posterior rami of the spinal nerves
actions of the spinalis
acts unilaterally to laterally flex the vertebral column and bilaterally to extend the vertebral column and neck
- erector spinae are the major extensors of the
deep muscles of the back - intrinsic (transversospinalis)
- semispinalis
- multifidus
- rotators
- found in the groove between the