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

Which of the cervical intertransversarii is innervated by dorsal rami of cervical spinal nerves?

Answer 3

posterior medial belly, cervical intersversarii

Question 4

What is the origin of the medial belly of the lumbar intertransversarii?

Answer 4

accessory process of the transverse process L1-L4

mammaillary process of superior articular process L1-L4

Question 5

Which muscle group is innervated by both dorsal rami and ventral spinal rami?

Answer 5

intertransversarii

Question 6

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

Answer 6

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