J Korean Ophthalmol Soc.  1993 Dec;34(12):1262-1268.

Distribution of Serotonin-2 Receptor in the Superior Collicullus of the Adult Rat: A Radioarutographic Study

• Lee NK
• Kim MH
• Ahn CB

Abstract

The superior colliculus is a laminated structure that consisted with superficial and deep layers in the roof of midbrain and the center of visual information and sensorimotor intergration. The deep layers of the mammalian superior colliculus are concerned with generation of eye movements. Serotonin is a neurotransmitter of the central nervous system and its binding sites can be classified into serotonin-1 receptor, serotonin-2 receptor and serotonin-3 receptor according to their pharmacological characteristics. The serotonin-2 receptors in the human brain presents in the motor cortex(area 4 of Brodmann) which role for the control of ocular motor activity and in the primary and secondary visual areas(areas 17 and 18 of Brodmann). Some of them presents in the limbic system role for the control of emotive activity, memory and other limbic functions. We performed this experiment to identify the anatomical distribution of the serotonergic nerve terminals in the superior colliculus of the rat by microscopicautography. It has been demonstrated that the serotonin-2 receptors of the superior colliculus are concerned with generation of saccade eye movements.

Keyword

Saccade eye movement; Serotonin receptor; Superior colliculus

MeSH Terms

Adult*
Animals
Binding Sites
Brain
Central Nervous System
Eye Movements
Humans
Limbic System
Memory
Mesencephalon
Motor Activity
Neurotransmitter Agents
Rats*
Receptors, Serotonin, 5-HT2
Saccades
Serotonin
Superior Colliculi
Neurotransmitter Agents
Receptors, Serotonin, 5-HT2
Serotonin