In a task where a participant is told to identify/recall the different sounds coming through each ear, most people will identify sounds that come from the right ear more accurately than the right ear. (Note: 50%of left-handers experience the reverse, which is a left-ear advantage).



The Right-Ear Advantage in Dichotic Presentation

Using a tachistoscope test, stimuli is presented to either the left or right visual field for less than 150 milliseconds to have the input only in the contralateral hemisphere.

These studies confirm the general division of labor between the hemispheres. The left hemisphere(right visual field) is better at processing verbal stimuli (letters and words). The right hemisphere (left visual field) is better at processing non-verbal stimuli (faces, geometric words, etc.). Simple visual detection is performed by both hemispheres.

Visual Perception of Linguistic Stimuli

In healthy individuals, studies on brain asymmetry focus primarily on hearing and vision. By directing auditory or visual stimuli to a single hemisphere, researchers can infer functional specializations based on the participants' responses.

University of Rochester

New York University

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- Hemisphere Specialization Using Split Brain Individuals
- Information Processing in the Hemispheres
- Auditory Specializations in the Hemispheres
- Cerebral Lateralization and Handedness
- Evolution of Hemispheric Asymmetry and Specialization

Subjects in Brain Asymmetry and Lateralization of Function

Breedlove, S. & Watson, N. (2017). Behavioral neuroscience, eighth edition. Oxford University Press.

Behavioral Neuroscience 8th Edition

Evolution of Hemispheric Asymmetry and Specialization

Cerebral Laterization and Handedness

Anatomical studies of the primary auditory cortex in the right and left hemispheres show how the different hemispheres play different roles in auditory perception.

- Planum Temporale
- Left Hemisphere and Speech
- Right Hemisphere and Music Perception
- Limits of Auditory Specializations

Auditory Specializations in the Brain Hemispheres

Information Processing in the Left and Right Brain Hemispheres

Several studies done on split brain humans and other animals  show the functions of each brain hemisphere in isolation from one another.

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