Unformatted text preview: The pars compacta is responsible for dopamine production and hence is involved in pleasure and addiction. The pars reticulata is responsible for creating action potentials in the absence of synaptic input. Diseases Pineal Gland : Parinaud’s syndrome is a condition where a pineal lesion presses on a pretectal area or the posterior commissure, causing loss of vertical gaze. Cerebral Aqueduct : A blockage of this duct can cause hydrocephalus. Hydrocephalus is the accumulation of cerebrospinal fluid which causes pressure on the skull and brain, followed by an enlarged head and possibly convulsions. Substantia Nigra : Perhaps the most well known disease associated with the substantia nigra is Parkinson’s. Deterioration of the pigmented and dopaminergic neurons in the substantia nigra is the underlying cause of Parkinson’s disease. Projections Pineal Gland : N/A Cerebral Aqueduct : N/A Substantia Nigra : Composed of two zones, the zona compacta and the zona reticulata....
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- Fall '07
- pineal gland, Substantia nigra, Functions Pineal Gland, pars compacta, pars reticulata