Question

1. Pain from a laceration on a finger is conveyed to the CNS by way of the

A) spinocerebellar pathway

B) posterior funiculus medial lemniscal pathway

C) tectospinal tract

D) anterolateral pathway

Answer 1

The answer to your query is as follows:

The correct answer is D) anterolateral pathway.

Pain from a laceration on a finger is conveyed to the CNS by way of the anterolateral pathway.

The spinothalamic tract is a part of the anterolateral system. It is a sensory pathway that conveys a message to the thalamus. With the help of the ventral posterolateral nucleus present in the thalamus this sensory information is transferred or relayed in the upward direction to the somatosensory cortex area of the brain.

The anterolateral system in the nervous system has an ascending pathway that conveys messages related to pain, temperature, and touch from the one end or periphery of the body to the central nervous system.

The spinocerebellar tracts cover the periphery of the lateral funiculus. It carries proprioceptive and information from the skin to the cerebellum of the hindbrain. It is mainly responsible for the control and coordination of body movements. So, option A. is incorrect.

The posterior funiculus medial lemniscus pathway is also called a dorsal column medial lemniscus pathway. It is a sensory pathway found in the central nervous system. It conveys messages of sensations like touch, vibration, and position from the skin and joints in the body.

So, option B. is incorrect. The posterior funiculus medial lemniscal pathway does not convey pain from a laceration on a finger to the CNS.

The tectospinal tract is also known as the colliculospinal tract. It is a nerve tract that controls and coordinates the movements of the head and eye. Thus, it coordinates with the reflex postural movements of the head and eyes whenever there is a change in visual and auditory stimuli.

So, option C. is incorrect.

Thus, option D. is correct. Anterolateral pathway conveys pain from a laceration on a finger to the CNS.

I hope it helps!