✦ LIBER ✦

Dynamic changes of optokinetic after-nystagmus (OKAN) caused by brief visual fixation periods in monkey and in man

✍ Scribed by W. Waespe; Th. Huber; V. Henn

Publisher: Springer-Verlag
Year: 1978
Tongue: English
Weight: 536 KB
Volume: 226
Category: Article
ISSN: 1433-8491
DOI: 10.1007/bf00344118

No coin nor oath required. For personal study only.

✦ Synopsis

Optokinetic nystagmus (OKN) continues after the cessation of visual stimulation in complete darkness as primary optokinetic after-nystagmus (OKAN I). After variable periods of time, it is followed by secondary OKAN (OKAN II). Short periods of visual fixation during OKAN I in monkey and in man inhibit OKAN I, but enhance OKAN II. The enhanced OKAN II starts earlier, lasts longer, and often reaches higher slow-phase velocities than in control experiments. Therefore, OKAN II depends not on the ocurrence or strength of OKAN I, but mainly on parameters of the preceding optokinetic stimulus. Results suggest that OKAN I duration is partially determined by the development of OKAN II.

📜 SIMILAR VOLUMES

Reciprocal changes in primary and second

Reciprocal changes in primary and secondary optokinetic after-nystagmus (OKAN) produced by repetitive optokinetic stimulation in the monkey

✍ W. Waespe; V. Henn 📂 Article 📅 1978 🏛 Springer-Verlag 🌐 English ⚖ 431 KB

In six rhesus monkeys (Macaca mulatta) the effect of repetitive periods of whole-field optokinetic stimulation upon the different phases of optokinetic after-nystagmus (OKAN) was studied. The preceding optokinetic stimulus consisted of rotating a striped cylinder around the stationary monkey. Experi