X. 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

What segment will represent the lowest attachment site for the semispinalis thoracis?

Answer 3

T12

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 osseous parts of the vertebral column serve as an origin to the semispinalis cervicis?

Answer 5

transverse tubercles of T1-T5 or T6 and articular processes of C4-C7

Question 6

What is the innervation of the semispinalis cervicis?

Answer 6

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

Question 7

What osseous parts of the vertebral column serve as an origin to the semispinalis capitis?

Answer 7

transverse tubercles of C7, T1-T6 or T7 & articular processes of C4-C8

Question 8

The biventer cervicis is formed by the fusion of what muscles?

Answer 8

semispinalis capitis and spinalis cervicis

Question 9

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

Answer 9

multifidis

Question 10

What is the innervation of the classic multifidis?

Answer 10

dorsal rami of C3-C8, T1-T12, L1-L5 and S1 spinal nerves (cord levels C3-C8, T1-T12, L1-L5 and S1)

Question 11

Contraction of multifidis cervicis will result in what movements?

Answer 11

alters the zygapophyseal capsular ligament response to load distribution determines the cervical spine response to injury as evidenced by neck pain and is a significant contributor to postural control of the head and neck

Question 12

Contraction of multifidis lumborum will result in what movements?

Answer 12

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

Question 13

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

Answer 13

iliocostalis lumborum pars lumborum, longissimus thoracic pars lumborum and multifidis lumborum

Question 14

What will replace muscles spanning one or two segmental levels in the cervicals and lumbars?

Answer 14

deep layers of the multifidis

Question 15

What is the innervation of the semispinalis capitis?

Answer 15

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