Question

which of the following correctly lists the structures through which tactile stimuli travel after being converted into neural signals?
a. spinal cord, somatosensory cortex, thalamus
b. somatosensory cortex, thalamus, spinal cord
c. thalamus, spinal cord, somatosensory cortex
d. spinal cord, thalamus, somatosensory cortex

please select the best answer from the choices provided

a
b
c
d

Explanation:

Trace the pathway of tactile neural signals

Tactile stimuli are detected by sensory receptors in the skin, converted into electrical neural signals (transduction), and travel along sensory nerves to the spinal cord.

Identify the relay and processing centers

From the spinal cord, the signals ascend to the brainstem and then to the thalamus, which acts as the brain's sensory relay station. The thalamus routes the tactile information to the primary somatosensory cortex in the parietal lobe for conscious perception.

Match the sequence to the options

The correct anatomical sequence is: spinal cord \(
ightarrow\) thalamus \(
ightarrow\) somatosensory cortex. This matches option D.

Answer:

• A. spinal cord, somatosensory cortex, thalamus
• B. somatosensory cortex, thalamus, spinal cord
• C. thalamus, spinal cord, somatosensory cortex
• D. spinal cord, thalamus, somatosensory cortex (Correct answer)