Related Experiment Video
Updated: Jan 16, 2026
09:42
Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns
Published on: May 12, 2019
6.4K
Sensory origin of visually evoked activity in auditory cortex
Timothy Olsen1, Andrea Hasenstaub1
1Coleman Memorial Laboratory, University of California, San Francisco, CA, USA; Department of Otolaryngology-Head and Neck Surgery, University of California, San Francisco, CA 94143, USA.
Cell Reports
|October 1, 2025
Summary
Multisensory processing in the auditory cortex is not driven by face movements. Auditory cortex responses to visual input remain strong without face movement, confirming sensory origins.
Area of Science:
- Neuroscience
- Sensory processing
- Auditory cortex research
Background:
- Cross-modal responses are frequently observed in primary sensory areas.
- A recent study suggested that signals in the primary visual cortex (V1) might be linked to face movements rather than multisensory integration.
Purpose of the Study:
- To investigate whether face movements explain multisensory processing in the primary auditory cortex (A1).
- To determine the origin of cross-modal responses in the auditory system.
Main Methods:
- Recorded neural activity and measured face movements in awake mice within the primary auditory cortex (A1) and primary visual cortex (V1).
- Stimulated mice with visual and auditory inputs, and also observed spontaneous activity.
- Used optogenetic silencing of V1 to assess its influence on A1 activity.
Main Results:
- Visual stimuli infrequently elicited face movements.
- Auditory cortex (A1) responses to visual input were robust, even without concurrent face movement.
- Silencing the primary visual cortex (V1) diminished the visual responses observed in the auditory cortex (A1).
Conclusions:
- Cross-modal responses in the auditory system are primarily driven by sensory input, not by behavioral states like face movements.
- The findings challenge the notion that face movements are a significant factor in auditory cross-modal processing.
Related Concept Videos
01:14Motor and Sensory Areas of the Cortex
7.0K
The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex....
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex....
7.0K
01:15Auditory Pathway
7.1K
Auditory pathways constitute the complex neural circuits responsible for transmitting and interpreting auditory information from the peripheral auditory system to the brain. Sound waves are initially captured by the outer ear, funneled through the ear canal, and reach the tympanic membrane (eardrum). These vibrations are transmitted via the middle ear's ossicles to the inner ear's cochlea.
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking...
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking...
7.1K
01:23Somatosensory, Motor, and Association Cortex
2.3K
The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at...
2.3K
01:24Vision
59.4K
Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
59.4K
01:31Hearing
56.5K
When we hear a sound, our nervous system is detecting sound waves—pressure waves of mechanical energy traveling through a medium. The frequency of the wave is perceived as pitch, while the amplitude is perceived as loudness.
56.5K
01:21Association Areas of the Cortex
8.9K
Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
8.9K