Transversospinalis Musculature

Question 1

Which muscles are identified as transversospinalis muscles?

Answer 1

semispinalis, multifidis, and rotators

Question 2

How many vertebrae can be attached to a single segment by transversospinalis muscles?

Answer 2

as many as 9 vertebrae

Question 3

Contraction of semispinalis thoracis will result in what movements?

Answer 3

extension, lateral flexion & rotation of upper thoracic and lower cervical spine,
bilaterally they act to extend the thoracic spine

Question 4

What is the innervation of the semispinalis thoracis?

Answer 4

dorsal rami of T1-T6 spinal nerves (cord levels T1-T6)

Question 5

What is the innervation of the semispinalis cervicis?

Answer 5

dorsal rami of C6-C8 spinal nerves (cord levels C6-C8)

Question 6

What is the innervation of the semispinalis capitis?

Answer 6

dorsal rami of C1-C6 spinal nerves (cord levels C1-C6)

Question 7

The semispinalis capitis and spinals capitis may fuse to form what muscle?

Answer 7

biventer cervicis

Question 8

What osseous parts of the vertebral column serve as an origin to the classic multifidis?

Answer 8

articular process of C4-C7, transverse processes of T1-T12, mammillary processes of L1-L5 and the dorsal surface of S1-S4 or S5

Question 9

Which transversospinalis muscle attaches to articular and mammillary processes along the spine?

Answer 9

multifidis

Question 10

Contraction of the classic multifidis will result in what movements of the vertebral column?

Answer 10

lateral flexion & rotation of the spine, maintains the lumbar lordotic curve and prevents entrapment of zygapopyseal capsular ligament during movement

Question 11

Which muscles of the spine exhibit a reversal of the expected origin-insertion combination?

Answer 11

iliocostalis lumborum pars lumborum, longissimus thoracis pars lumborum and multifidis lumborum

Question 12

Rotator muscles are typically identified in what region of the spine?

Answer 12

thoracic region