Difficulty in swallowing.

Cerebellar ataxia refers to ataxia due to dysfunction of the cerebellum. This causes a variety of elementary neurological deficits including asynergy (lack of coordination between muscles, limbs and joints), dysmetria (lack of ability to judge distances that can lead to under- or overshoot in grasping movements), and dysdiadochokinesia (inability to perform rapid movements requiring antagonizing muscle groups to be switched on and off repeatedly).

Dysarthric speech is a general description referring to a neurological speech disorder characterized by poor articulation. Depending on the involved neurological structures, dysarthria may be further classified as spastic, flaccid, ataxic, hyperkinetic and hypokinetic, or mixed.

An unintentional, oscillating to-and-fro muscle movement about a joint axis.

A shaky or wobbly manner of walking.

Absence of neurologic reflexes such as the knee-jerk reaction.

A type of ataxia characterized by the impairment of the ability to perform rapidly alternating movements, such as pronating and supinating his or her hand on the dorsum of the other hand as rapidly as possible.

Atrophy (wasting, decrease in size of cells or tissue) affecting the cerebrum.

Cerebellar atrophy is defined as a cerebellum with initially normal structures, in a posterior fossa with normal size, which displays enlarged fissures (interfolial spaces) in comparison to the foliae secondary to loss of tissue. Cerebellar atrophy implies irreversible loss of tissue and result from an ongoing progressive disease until a final stage is reached or a single injury, e.g. an intoxication or infectious event.

An abnormality characterized by disruption of the normal functioning of peripheral axons.

Inability to walk in a person who previous had the ability to walk.

Loss of cognitive developmental skills, as manifested by loss of developmental cognitive milestones.

The presence of an abnormal lateral curvature of the spine.

A lack of strength of the proximal muscles.

A phenomenon whereby patients are not able to stand up without the use of the hands owing to weakness of the proximal muscles of the lower limbs.

The presence of skeletal muscular atrophy (which is also known as amyotrophy).