Neurological levels schematic

The video tutorial explains the structure and function of the neural tube, neural crest cells, and somites, focusing on their role in forming the vertebrae, dermis, and muscles. It details the migration of cells and the formation of dermatomes and myotomes, as well as the anatomy of spinal nerves and vertebral elements. The tutorial also covers the vertebral and spinal cord levels, highlighting the differences in cervical, thoracic, lumbar, and sacral regions, and concludes with a detailed look at the anatomy of the spinal cord and its associated nerves.

What is the primary role of the sclerotome in somites?

• To produce vertebrae

• To develop sensory neurons

• To form the dermis of the skin

• To create limb muscles

Which cells are responsible for forming the sensory bodies of pseudo unipolar neurons?

• Dermatomes

• Myotomes

• Neural crest cells

• Sclerotomes

How many somites are typically found in the human body?

• 20

• 50

• 33

• 40

What is the term for the dorsal branch of the spinal nerve?

• Ventral ramus

• Dorsal ramus

• Neural crest

• Sclerotome

Where does the spinal cord end in relation to the vertebral levels?

• Between T12 and L1

• Between L1 and L2

• Between L2 and L3

• Between L3 and L4

Which spinal nerve courses above its associated vertebra?

• C1

• C2

• T1

• L1

What is the dermatome associated with the C5 nerve?

• Skin over the dorsum of the foot

• Skin over the pinky

• Skin over the lateral shoulder

• Skin over the heel

Which muscles are primarily associated with the C8 myotome?

• Muscles that flex the wrist

• Muscles that abduct the shoulder

• Muscles that plantarflex the ankle

• Muscles that dorsiflex the ankle

What is the dermatome associated with the L5 nerve?

• Skin over the heel

• Skin over the lateral shoulder

• Skin over the dorsum of the foot

• Skin over the pinky

Which muscles are associated with the S1 myotome?

• Muscles that plantarflex the ankle

• Muscles that flex the wrist

• Muscles that abduct the shoulder

• Muscles that dorsiflex the ankle