The role of the corpus callosum and extra striate visual areas in stereoacuity in macaque monkeys

A Cowey, F Wilkinson


Stereoacuity was measured in six normal male rhesus monkeys by requiring them to indicate the closer of two vertical line targets. Their stereoacuity ranged from 13-23 arc sec and was as good as that of human observers tested in the same way. Sectioning the splenium of the corpus callosum, either before or after removing the foveal representation in visual area 2, had no effect on stereoacuity thresholds, indicating that the splenium is not essential for the detection of small retinal disparities at the visual mid-line. In contrast, removal of the foveal representation in V2 permanently and markedly elevated stereoacuity thresholds, almost to the level observed in two monkeys after removal of the representation in striate cortex of the central 5 degrees of the retina. Posterior infero-temporal ablation also impaired stereoacuity, though less strikingly. In these two monkeys, the effect of subsequent damage to the rostral superior colliculi was examined. One animal was unimpaired. In the other, in which the pre-tectum was damaged, the stereoacuity threshold was substantially raised, most plausibly as a consequence of imperfect binocular fixation.


Jun 4, 1979·Proceedings of the Royal Society of London. Series B, Containing Papers of a Biological Character·S M Zeki
Jun 4, 1979·Proceedings of the Royal Society of London. Series B, Containing Papers of a Biological Character·A Cowey, J Porter
Apr 1, 1978·The Journal of Physiology·S M Zeki
Dec 1, 1978·Brain : a Journal of Neurology·G DantaD J O'Boyle
Apr 1, 1975·Vision Research·R F Sarmiento
Jan 1, 1986·Experimental Brain Research·K A Lawler, A Cowey
Jan 1, 1986·Experimental Brain Research·Franco LeporeMaryse Lassonde
Jan 1, 1985·Experimental Brain Research·B TimneyM L Vandewater
Aug 1, 1973·The Journal of Comparative Neurology·J StoneS M Sherman
Nov 1, 1969·The Journal of Physiology·C Blakemore
Jan 1, 1970·Vision Research·C Blakemore
Jan 1, 1970·Vision Research·D E Mitchell, C Blakemore
Dec 1, 1970·The Journal of Physiology·C Blakemore
Jul 1, 1969·Vision Research·G Westheimer, D E Mitchell
Jan 1, 1983·Behavioural Brain Research·J E Ross


Jan 1, 1983·Behavioural Brain Research·J E Ross
Dec 4, 2003·Neuropsychologia·Dave Saint-AmourJean-Paul Guillemot
Mar 1, 1993·Seizure : the Journal of the British Epilepsy Association·R M Dasheiff, A L Ritaccio
Oct 7, 2009·Proceedings of the National Academy of Sciences of the United States of America·Christopher L StriemerMelvyn A Goodale
Apr 3, 2001·Annual Review of Neuroscience·B G Cumming, Gregory C DeAngelis
Nov 6, 2007·The Journal of Neuroscience : the Official Journal of the Society for Neuroscience·Anna W RoeGregory C DeAngelis
Jun 1, 1994·Psychiatry Research·B S PetersonD J Cohen
Jan 1, 1996·Current Biology : CB·A Cowey
Jun 2, 2009·Brain Research Reviews·Reza Farivar
Jun 9, 2016·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Holly Bridge
Jun 9, 2016·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Bram-Ernst VerhoefPeter Janssen
Apr 18, 2003·Brazilian Journal of Medical and Biological Research = Revista Brasileira De Pesquisas Médicas E Biológicas·F Aboitiz, J Montiel
Apr 25, 2007·Nature Reviews. Neuroscience·Andrew J Parker
Feb 13, 2021·Proceedings of the National Academy of Sciences of the United States of America·Agostino GibaldiMartin S Banks

Related Concepts

Functional Cerebral Localization
Corpus Callosum
Depth Perception
Macaca mulatta
Pattern Recognition, Visual
Sensory Thresholds
Optic Lobe, Human
Visual Acuity

Trending Feeds


Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Systemic Juvenile Idiopathic Arthritis

Systemic juvenile idiopathic arthritis is a rare rheumatic disease that affects children. Symptoms include joint pain, but also fevers and skin rashes. Here is the latest on this disease.

Chromatin Regulation and Circadian Clocks

The circadian clock plays an important role in regulating transcriptional dynamics through changes in chromatin folding and remodelling. Discover the latest research on Chromatin Regulation and Circadian Clocks here.

Central Pontine Myelinolysis

Central Pontine Myelinolysis is a neurologic disorder caused most frequently by rapid correction of hyponatremia and is characterized by demyelination that affects the central portion of the base of the pons. Here is the latest research on this disease.

Myocardial Stunning

Myocardial stunning is a mechanical dysfunction that persists after reperfusion of previously ischemic tissue in the absence of irreversible damage including myocardial necrosis. Here is the latest research.

Pontocerebellar Hypoplasia

Pontocerebellar hypoplasias are a group of neurodegenerative autosomal recessive disorders with prenatal onset, atrophy or hypoplasia of the cerebellum, hypoplasia of the ventral pons, microcephaly, variable neocortical atrophy and severe mental and motor impairments. Here is the latest research on pontocerebellar hypoplasia.

Cell Atlas Along the Gut-Brain Axis

Profiling cells along the gut-brain axis at the single cell level will provide unique information for each cell type, a three-dimensional map of how cell types work together to form tissues, and insights into how changes in the map underlie health and disease of the GI system and its crosstalk with the brain. Disocver the latest research on single cell analysis of the gut-brain axis here.

Chronic Traumatic Encephalopathy

Chronic Traumatic Encephalopathy (CTE) is a progressive degenerative disease that occurs in individuals that suffer repetitive brain trauma. Discover the latest research on traumatic encephalopathy here.

Related Papers

Toxicon : Official Journal of the International Society on Toxinology
Archives of Physiology and Biochemistry
B A BaconJ P Guillemot
Perception & Psychophysics
Chang Hong LiuAvi Chaudhuri
International Clinical Psychopharmacology
T Gale, C Hawley
© 2021 Meta ULC. All rights reserved