Day 35 (Myology of the Back: superficial back musculature, unique layer of the posterior neck, erector spinae, transversospinalis musculature) Flashcards
The trapezius is innervated by what nerve?
the spinal accessory nerve
What forms the spinal accessory nerve innervating the trapezius?
C1-C5 cord levels contribute to the spinal root of the spinal accessory nerve
The latissimus dorsi is innervated by what nerve?
the thoracodorsal nerve
What forms the thoracodorsal nerve innervating the latissimus dorsi?
ventral rami from C6-C8
What forms the dorsal scapular nerve?
the ventral ramus of C5
What is the innervation of the splenius capitis?
dorsal rami of middle cervical spinal nerves (C3-C5 cord levels)
Splenius cervicis will attach to what locations on the spine?
lateral mass of C1 & posterior tubercle of transverse process on C1-C4
Which muscles are identified as erector spinae or sacrospinalis muscles?
iliocostalis, longissimus, spinalis
What is the innervation of the iliocostalis lumborum?
dorsal rami of lower thoracic and all lumbar spinal nerves
What osseous parts of the vertebral column serve as an origin to the iliocostalis thoracis?
none
What is the insertion for the iliocostalis thoracis?
costal angles of the upper 6-7 ribs, transverse process of C7
What osseous parts of the vertebral column serve as an origin to the longissimus thoracis?
accessory process & transverse process of L1-L5, spinous processes of L3-L5 and median sacral crest S1-S3
What is the innervation of the longissimus cervicis?
dorsal rami of C4-C8 and T1-T2 spinal nerves (C4-C8 & T1-T2 cord levels)
What osseous parts of the vertebral column serve as an origin to the spinalis thoracis?
spinous processes of T11 & T12-L1 & L2
Which muscles are identified as transversospinalis muscles?
semispinalis, multifidis, and rotators
