Give Meanings for the Following Prefixes

question 28

Short Answer

Give meanings for the following prefixes.
-dys-: __________

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Definitions:

Thalamus

A part of the brain located in the center of the cerebral hemisphere, which acts as a relay station for sensory information.

Epithalamus

A posterior segment of the diencephalon of the brain, involved in the regulation of sleep-wake cycles and the secretion of melatonin from the pineal gland.

Corpora Quadrigemina

Located in the midbrain, the corpora quadrigemina is composed of four colliculi - two superior and two inferior - involved in visual and auditory reflexes.