Question

question 20
which of the following spinal nerve tracts is involved in motor functions?
a dorsal columns
b corticospinal tracts
c spinocerebellar tracts
d spinothalamic tracts

Explanation:

• Dorsal columns: These are sensory tracts that carry information related to fine touch, vibration, and proprioception. They are not involved in motor functions.
• Corticospinal tracts: These are major motor tracts. They originate in the cerebral cortex and carry motor commands from the brain to the spinal cord, which then innervate muscles to produce movement.
• Spinocerebellar tracts: These are involved in relaying information about the position of muscles (proprioception) to the cerebellum for coordination of movement. They are not directly motor - command - carrying tracts.
• Spinothalamic tracts: These are sensory tracts that carry pain, temperature, and crude touch information.

Answer:

B. corticospinal tracts