Related Experiment Video
Updated: Oct 10, 2025
08:43
Combined Shuttle-Box Training with Electrophysiological Cortex Recording and Stimulation as a Tool to Study Perception and Learning
Published on: October 22, 2015
10.4K
Intracortical microstimulation of somatosensory cortex enables object identification through perceived sensations
Summary
Brain-machine interfaces use intracortical microstimulation (ICMS) to provide tactile feedback for sensorimotor deficits. This study shows bioinspired ICMS effectively restores object identification abilities, enhancing functional independence.
Area of Science:
- Neuroscience
- Biomedical Engineering
- Rehabilitation Technology
Background:
- Brain-machine interfaces (BMIs) aim to restore function in individuals with sensorimotor deficits.
- Effective sensory feedback remains a significant challenge in current BMI technology.
- Intracortical microstimulation (ICMS) offers a promising approach for bioinspired sensory feedback.
Purpose of the Study:
- To evaluate the efficacy of different ICMS paradigms for generating tactile percepts.
- To assess the functional benefit of bioinspired sensory feedback in a sensorimotor task.
- To explore stimulation strategies optimizing grip force and its derivative for tactile feedback.
Main Methods:
- ICMS was applied to the primary somatosensory cortex in a human participant with implanted microelectrode arrays.
- A 3-choice object identification task was performed using tactile feedback without visual input.
- Three stimulation paradigms with varying grip force and derivative weightings were tested.
Main Results:
- The participant successfully identified objects above chance levels across all tested paradigms.
- Object identification accuracy reached 80% with sustained grip force feedback alone.
- Accuracy was 76.7% with equal weighting of grip force and its derivative.
Conclusions:
- Bioinspired ICMS can deliver functionally beneficial sensory feedback for sensorimotor tasks.
- Optimized stimulation paradigms can enhance information transmission for intuitive user integration.
- Developing efficient ICMS strategies is crucial for safer stimulation and improved BMI functionality.
Related Concept Videos
01:33Somatosensation
40.1K
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.
40.1K
01:24Somatosensory, Motor, and Association Cortex
1.2K
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...
1.2K
01:11Sensory Perception: Organization of the Somatosensory System
8.4K
The somatosensory system is the central and peripheral nervous system component that senses and processes touch, pressure, pain, temperature, and body position or proprioception. The process of sensation takes place at three levels:
The receptor level:
The receptor level is the first stage of sensation. It involves the detection of a stimulus by specialized sensory receptors. The stimulus must arrive within the receptor's receptive field. Next, the receptor converts the energy of the...
The receptor level:
The receptor level is the first stage of sensation. It involves the detection of a stimulus by specialized sensory receptors. The stimulus must arrive within the receptor's receptive field. Next, the receptor converts the energy of the...
8.4K
01:14Motor and Sensory Areas of the Cortex
5.1K
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....
5.1K