Superior colliculus cell types and models of saccade generation

doi:10.1016/0959-4388(94)90134-1

Current Opinion in Neurobiology

Volume 4, Issue 6, December 1994, Pages 857-861

https://doi.org/10.1016/0959-4388(94)90134-1 Get rights and content

Abstract

Recent experiments on the cat and monkey have revealed several different cell types within the superior colliculus, including fixation, burst, and build up cells. During primate saccades, activity remains fixed at one location in burst cells, but spreads across the colliculus in build up cells. New models based on the activity of these cell types suggest their functional roles in saccade generation.

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Citation Excerpt :
Simultaneous activation of ipsiversive and contraversive gaze shifting signals. In the monkey superior colliculus, fixation cells and saccade-related cells (burst neurons) reciprocally inhibit each other (Wurtz and Optican, 1994), and the threshold current required for eliciting saccades from the frontal eye field (FEF) is increased if the animal actively fixates a visual target (Goldberg et al., 1986). Consequently, any decreased activity in the fixation system before saccade triggering significantly reduces saccade latencies, a phenomenon responsible for the gap effect (Weber and Fischer, 1995; Dorris et al., 1997).
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Superior colliculus cell types and models of saccade generation

Abstract

J Neurophysiol

Exp Brain Res

J Neurophysiol

Biol Cybern

Biol Cybern

Neural Networks

Signal transformations required for the generation of saccadic eye movements

Annu Rev Neurosci

Population coding of saccadic eye movements by neurons in the superior colliculus

Nature

Movement of neural activity on the superior colliculus motor map during gaze shifts

Science

Control of orienting gaze shifts by the tectoreticulospinal system in the head-free cat. III. Spatiotemporal characteristics of phasic motor discharges

J Neurophysiol

Fixation cells in monkey superior colliculus. I. Characteristics of cell discharge

J Neurophysiol

Fixation and orientation control by the tecto-reticulo-spinal system in the cat whose head is unrestrained

Rev Neurol Paris

Control of orienting gaze shifts by the tectoreticulospinal system in the head-free cat. II. Sustained discharges during motor preparation and fixation

J Neurophysiol

Fixation cells in monkey superior colliculus. 11. Reversible activation and deactivation

J Neurophysiol

Saccadic eye movements after extremely short reaction times in the monkey

Brain Res

Role of the rostral superior colliculus in active visual fixation and execution of express saccades

J Neurophysiol

Discharge characteristics of single units in superior colliculus of the alert rhesus monkey

J Neurophysiol