Hemiparesis is best defined as which of the following?

Hemiparesis is best defined as which of the following?

• A. Complete paralysis of all limbs
• B. Weakness on one side of the body
• C. Tremor on both sides
• D. Facial droop only

Answer: (B)

Hemiparesis means weakness on one side of the body, usually due to a lesion in motor pathways of the brain or spinal cord. This unilateral weakness is the defining feature and is often opposite the side of the brain that’s damaged (for example, a left-brain injury can produce weakness on the right side). This distinguishes it from complete paralysis of all limbs (paralysis would imply no movement at all), tremor on both sides (a rhythmic movement disorder, not weakness), or facial droop alone (which may reflect facial muscle weakness but doesn’t describe weakness across the limbs). So the best definition is weakness on one side of the body.

Hemiparesis means weakness on one side of the body, usually due to a lesion in motor pathways of the brain or spinal cord. This unilateral weakness is the defining feature and is often opposite the side of the brain that’s damaged (for example, a left-brain injury can produce weakness on the right side). This distinguishes it from complete paralysis of all limbs (paralysis would imply no movement at all), tremor on both sides (a rhythmic movement disorder, not weakness), or facial droop alone (which may reflect facial muscle weakness but doesn’t describe weakness across the limbs). So the best definition is weakness on one side of the body.