Testing Spinal cord and Nerves (Part D)

The video tutorial explains the roles of motor and sensory neurons in the dorsal and ventral ramus, highlighting that both are mixed nerves. It discusses how the ventral ramus directly innervates intercostal muscles. The tutorial also covers the effects of dorsal root injury, which affects sensory neurons from the back and anterior lateral body wall, while motor functions remain unaffected due to the ventral root's role.

Which type of neurons are found in both the dorsal and ventral ramus?

• Both motor and sensory neurons

• Sensory neurons only

• Motor neurons only

• Neither motor nor sensory neurons

What part of the spinal nerve is responsible for innervating the intercostal muscles?

• Dorsal root

• Ventral root

• Dorsal ramus

• Ventral ramus

If the dorsal root is injured, what is the likely outcome?

• Loss of motor function

• Loss of sensation

• No effect on sensation or motor function

• Loss of both motor function and sensation

Which part of the spinal nerve carries sensory neurons from the back?

• Dorsal ramus

• Ventral root

• Dorsal root

• Ventral ramus

What remains unaffected if the dorsal root is injured?

• Both sensory and motor functions

• Motor function

• Neither sensory nor motor functions

• Sensory function