Erector Spinae (sacrospinalis) Flashcards
Which muscles are identified as erector spinae or sacrospinalis muscles?
iliocostalis, longissimus, spinalis
What is the innervation of iliocostalis lumborum?
dorsal rami of lower thoracic and all lumbar spinal nerves
What is the insertion for the iliocostalis thoracis?
costal angles of the upper 6-7 ribs, transverse process of C7
Which subdivisions of the iliocostalis primarily originates & inserts on ribs?
iliocostalis thoracis
What is the innervation of iliocostalis thoracis?
dorsal rami of upper 6 thoracic spinal nerves (T1-T6 cord levels)
What is the origin of iliocostalis cervicis?
posterior tubercle of transverse process of C(3) C4-C6
What is the innervation of the iliocostalis cervicis?
dorsal rami of T1, T2 spinal nerves, sometimes C8 spinal nerve (C8, T1, T2 cord levels)
What osseous parts of the vertebral column serve as an origin to the longissimus thoracis?
accessory process & transverse processes of L1-L5, spinous processes of L3-L5 and median sacral crest S1-S3
What is the innervation of longissimus thoracis?
dorsal rami of all thoracic and lumbar spinal nerves (cord levels T1-T12, L1-L5)
What osseous parts of the vertebral column serve as an insertion for the longissimus cervicis?
posterior tubercle of transverse processes from C2-C6 or C7, articular processes from C2-C6 or C7
What is the innervation of longissimus cervicis?
dorsal rami of C4-C8 and T1-T2 spinal nerves (C4-C8 & T1-T2 cord levels)
What is the innervation of longissimus capitis?
dorsal rami of C1-C3 or C4 spinal nerves, (C1- C3 or C4 cord levels)
Which erector spinae muscles attach to cervical articular processes?
longissimus cervicis and longissimus capitis
What is the innervation of spinalis thoracis?
dorsal rami of all thoracic & upper lumbar spinal nerves
What is the innervation of spinalis cervicis?
dorsal rami of all cervical spinal nerves (C1-C8 cord levels)
