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 Intertransversarii

Question 4

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

Answer 4

Accessory Process of Transverse Process L1-L4

Mammillary Process of Superior Articular Process L1-L4

Question 5

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

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 interspinalis to coordinate the smooth movement of the spine and to maintain appropriate posture.