Related Experiment Video
Updated: Aug 15, 2026
07:10
Recording Spatially Restricted Oscillations in the Hippocampus of Behaving Mice
Published on: July 1, 2018
A dissociation between spatial and identity matching in callosotomy patients
P M Corballis1, M G Funnell, M S Gazzaniga
1Center for Cognitive Neuroscience, Dartmouth College, Hanover, NH 03755, USA.
Neuroreport
|July 29, 1999
Summary
The human brain
Area of Science:
- Neuroscience
- Cognitive Psychology
- Neurobiology
Background:
- The human brain exhibits functional asymmetries between its left and right hemispheres, with some, like language, being well-understood.
- Visuospatial processing asymmetries are less understood, though the right hemisphere is often implicated.
Observation:
- This study examined the visuospatial and identity discrimination abilities of two callosotomy patients with surgically separated cerebral hemispheres.
- The researchers assessed how each hemisphere performed on tasks requiring spatial judgments versus identity judgments.
Findings:
- A significant right-hemisphere advantage was observed for spatial judgment tasks.
- The left hemisphere demonstrated a slight superiority in making identity judgments compared to the right hemisphere.
Implications:
- These findings support the specialization of the right hemisphere for spatial processing.
- The results suggest the left hemisphere is more adept at pattern recognition, contributing to our understanding of brain lateralization.
Related Concept Videos
01:33Somatosensation
The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.
01:05Cerebral Hemispheres
The human brain, a complex organ, is functionally divided into two cerebral hemispheres—left and right. These hemispheres are interconnected by a structure of paramount importance, the corpus callosum. This substantial bundle of neural fibers is not just a bridge between the hemispheres but a crucial element for the brain's comprehensive functioning. It enables efficient communication between the two hemispheres, allowing each side of the brain to control and receive sensory and motor...
01:28Lateralization
Brain lateralization refers to the division of mental processes and functions between the two hemispheres of the brain, a phenomenon that optimizes neural efficiency and underpins complex abilities in humans. This specialization allows each hemisphere to perform tasks where it has a comparative advantage, facilitating more refined cognitive capabilities across different domains.
01:19Role of Hippocampus in Memory
The hippocampus, a critical brain structure, plays an essential role in memory processing, particularly in the formation and retrieval of memory. This small, seahorse-shaped region is located within the medial temporal lobe, with one hippocampus in each brain hemisphere. Experimental studies involving lesions in the hippocampi of rats have demonstrated significant impairments in tasks such as object recognition and maze navigation, indicating the hippocampus involvement in both recognition and...
01:21Dissociative Amnesia
Dissociative amnesia is a complex psychological condition that manifests as an inability to recall personal information, often tied to traumatic or stressful events. Unlike general amnesia, individuals with this condition retain the ability to perform routine activities and procedural tasks, such as operating a phone or navigating public transportation, yet experience profound gaps in autobiographical memory. These lapses may encompass significant life events, such as suicide attempts or...