**Question:** All is true about Brown-Séquard syndrome except

A. It is caused by a spinal cord injury.
B. It results in complete loss of sensation and motor function on one side of the body.
C. It is a rare condition affecting only pregnant women.
D. It is a neurological disorder named after Brown-Séquard, a French neurologist.

**Core Concept:** Brown-Séquard syndrome is a neurological condition resulting from unilateral spinal cord injury, typically caused by needle injury or tumor. This injury leads to sensory and motor dysfunction on one side of the body. The syndrome is named after Édouard Brown-Séquard, a French neurologist who first described the condition in 1884.

**Why the Correct Answer is Right:** Brown-Séquard syndrome arises from a unilateral spinal cord injury, which disrupts the communication between the spinal cord and the brain. The injury causes a loss of sensory and motor function on one side of the body due to the destruction of neurons and their connections. The condition is named after its discoverer, Édouard Brown-Séquard, who studied the effects of spinal cord injury and demonstrated the separation of the spinal cord into ventral (sensory) and dorsal (motor) columns.

**Why Each Wrong Option is Incorrect:**

A. While Brown-Séquard syndrome can be caused by spinal cord injury, it is not exclusively limited to pregnant women. The condition can affect people of any age group due to spinal cord injury.

B. Brown-Séquard syndrome results in a combination of sensory and motor dysfunction on one side of the body, not complete loss of sensation and motor function.

C. Brown-Séquard syndrome is not limited to pregnant women. It can occur in individuals of any sex and demographic due to spinal cord injury.

D. Although named after its discoverer, the syndrome is not solely attributed to Édouard Brown-Séquard. It is a neurological condition resulting from spinal cord injury, not a disease entity named after its discoverer.

**Clinical Pearl:** Brown-Séquard syndrome is a neurological condition resulting from a unilateral spinal cord injury. It presents with a combination of sensory and motor deficits on one side of the body, not a complete loss of sensory and motor function. The syndrome is named after Édouard Brown-Séquard, who studied the spinal cord's sensory and motor columns. This condition can affect individuals of any age group and is not limited to pregnant women.