X. Accessory Muscles of the Vertebral Column

Question 1

Interspinalis is paired in which regions of the spine?

Answer 1

cervical and lumbar regions

Question 2

Based on the density of muscle spindles, what is the proposed function of the interspinalis?

Answer 2

acts as a proprioceptive transducer in conjunction with intertransversarii to coordinate the smooth movement of the spine and to maintain appropriate posture

Question 3

Intertransversarii are paired in which region(s) of the spine?

Answer 3

cervical and lumbar regions

Question 4

What is the innervation of each part of the cervical intertransversarii?

Answer 4

anterior belly, cervical intertransversarii… ventral ramus, cervical spinal nerve
posterior lateral belly, cervical intertransversarii…ventral ramus, cervical spinal nerve
posterior medial belly, cervical intertransversarii…dorsal ramus, cervical spinal nerve

Question 5

What is the innervation of each part of the lumbar intertransversarii?

Answer 5

medial belly, lumbar intertransversarii…dorsal ramus, lumbar spinal nerve
anterior lateral belly, lumbar intertransversarii…ventral ramus, lumbar spinal nerve
posterior lateral belly, lumbar intertransversarii… ventral ramus, lumbar spinal nerve

Question 6

Which muscle groups is innervated by both dorsal rami and ventral rami of spinal nerves?

Answer 6

intertransversarii

Question 7

Based on the density of muscle spindles what is the proposed function of the intertransversarii?

Answer 7

acts as a proprioceptive transducer in conjunction with interspinalis to coordinate the smooth movement of the spine and to maintain appropriate posture