The term ______ refers to small, inflamed pouches in the colon lining.

A. resting tremor.: This involuntary oscillation typically presents as a "pill-rolling" motion of the hands when the limb is at ease. It is caused by the rhythmic discharge of neurons in the basal ganglia. It usually diminishes during purposeful movement or sleep.

B. loss of sensation.: Parkinson's disease is primarily a motor system disorder and does not typically involve the primary sensory pathways. Patients generally retain normal tactile, thermal, and proprioceptive perception. Sensory loss suggests a different neurological pathology like peripheral neuropathy.

C. bradykinesia.: This term describes the characteristic slowness of movement and a decrease in spontaneous motor activity. It affects tasks such as walking, facial expression, and fine motor skills. It is a fundamental diagnostic criterion for this extrapyramidal disorder.

D. cogwheel rigidity.: This refers to a jerky, ratchet-like resistance felt during passive stretching of the muscles. It results from a combination of increased muscle tone and the underlying resting tremor. It is a hallmark sign of basal ganglia dysfunction.

E. memory loss.: While cognitive decline can occur in late-stage Parkinson's disease, it is not part of the primary motor triad. Memory impairment is more characteristic of Alzheimer's disease or specific Lewy body dementia. The core diagnosis focuses on motoric dysfunction.

A. neither side of the body.: Cerebrovascular accidents involving the motor cortex or internal capsule almost always produce observable motor deficits. Absence of weakness would suggest a very small or non-motor area infarct. It is not the typical clinical presentation.

B. the left side of the body.: Ipsilateral weakness is rare because motor pathways undergo decussation in the medulla oblongata. A left-sided brain lesion affects the muscles on the opposite side. This does not follow the standard anatomical rule of motor control.

C. both sides of the body.: Bilateral paralysis usually indicates a brainstem injury or a spinal cord lesion rather than a hemispheric stroke. A single-sided cortical infarct is limited in its motor distribution. It affects only one half of the body.

D. the right side of the body.: Upper motor neurons from the left motor cortex cross over at the pyramidal decussation to control the right side. Consequently, damage to the left hemisphere results in contralateral hemiparesis or hemiplegia. This is a fundamental neuroanatomical principle.