Delayed or lack of conduction of atrial depolarizations through the atrioventricular node to the ventricles.

The upper eyelid margin is positioned 3 mm or more lower than usual and covers the superior portion of the iris (objective); or, the upper lid margin obscures at least part of the pupil (subjective).

Gliosis is the focal proliferation of glial cells in the central nervous system.

Abnormal excessive perspiration (sweating) despite the lack of appropriate stimuli like hot and humid weather.

A form of hypotension characterized by a sudden fall in blood pressure that occurs when a person assumes a standing position.

A sensation of unease in the stomach together with an urge to vomit.

Forceful ejection of the contents of the stomach through the mouth by means of a series of involuntary spasmic contractions.

Peripheral neuropathy affecting the sensory nerves.

Hyperreflexia is the presence of hyperactive stretch reflexes of the muscles.

Weakness of the peroneal muscles.

Characteristic neurologic anomaly resulting from degeneration of dopamine-generating cells in the substantia nigra, a region of the midbrain, characterized clinically by shaking, rigidity, slowness of movement and difficulty with walking and gait.

The presence of chronic diarrhea, which is usually taken to mean diarrhea that has persisted for over 4 weeks.

A loss of global cognitive ability of sufficient amount to interfere with normal social or occupational function. Dementia represents a loss of previously present cognitive abilities, generally in adults, and can affect memory, thinking, language, judgment, and behavior.

The presence of an unusually high plantar arch. Also called high instep, pes cavus refers to a distinctly hollow form of the sole of the foot when it is bearing weight.

Atrophy of the peroneous muscles, peroneus longus (also known as Fibularis longus), Peroneus brevis (also known as fibularis brevis, and Peroneus tertius (also known as fibularis tertius).

A reduction in the number of axons in the peripheral nervous system.

Muscular atrophy affecting muscles in the distal portions of the extremities.

A reduction in the speed at which electrical signals propagate along the axon of a neuron.

Diminution of tendon reflexes, which is an invariable sign of peripheral nerve disease.

An impairment of the electrical continuity between the atria and ventricles.

Trophic changes occurring in a limb.