Erector Spinae (Sacrospinalis) Flashcards
Which muscles are identified as erector spina or sacrospinalis muscles?
iliocostalis, longissimus, spinalis
What is the innervation of the iliocostalis lumborum?
dorsal rami of lower T and all L spinal nerves
Which subdivision of the iliocostalis primarily originates & inserts on ribs?
iliocostalis thoracis
What is the innervation of the iliocostalis thoracis?
dorsal rami of upper 6 thoracic spinal nerves (T1-T6 cord levels)
What is the insertion for the iliocostalis cervicis?
posterior tubercle of transverse process (C3), 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)
Which erector spina muscle is attached to the accessory process?
longissimus thoracis
What is the innervation of the longissimus thoracis?
dorsal rami of all thoracic & lumbar spinal nerves (cord levels T1-T12, L1-L5)
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 is the innervation of the longissimus capitis?
dorsal rami of C1-C3 or C4 spinal nerves, (C1-C3 or C4 cord levels)
Which erector spina muscles attach to cervical articular processes?
longissimus cervicis & longissimus capitis
What osseous parts of the vertebral column serve as an origin to the spinals thoracis?
spinous processes of T11 & T12, L1 & L2
What is the innervation of the spinals thoracis?
dorsal rami of all thoracic & upper lumbar spinal nerves
What is the innervation of the spinals cervicis?
dorsal rami of all cervical spinal nerves (C1-C8 cord levels)
What is the innervation of the spinals capitis?
dorsal rami of lower cervical & upper thoracic spinal nerves
