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Updated: Feb 16, 2026

Estimation of Contact Regions Between Hands and Objects During Human Multi-Digit Grasping

Estimation of Contact Regions Between Hands and Objects During Human Multi-Digit Grasping

Published on: April 21, 2023

Evolution of object identity information in sensorimotor cortex throughout grasp.

Yuke Yan¹, Anton R Sobinov^2,3, James M Goodman¹

¹Committee on Computational Neuroscience, University of Chicago, Chicago, IL, USA.

Nature Communications

|February 14, 2026

Summary

Object identity information increases in the brain

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Area of Science:

Neuroscience
Sensorimotor control

Background:

The brain processes continuous reaching and grasping.
Somatosensory signals change dramatically at object contact.
Maintaining object identity with changing signals is unclear.

Purpose of the Study:

To quantify object-specific neural information in sensorimotor cortex.
To understand how the brain encodes object identity during grasp.

Main Methods:

Recorded neural activity in primary motor cortex (M1) and somatosensory areas 3a, 3b/1, and 2.
Analyzed object-specific information in neurons of male macaque monkeys.

Main Results:

Object identity information increased across sensorimotor cortex post-contact.
Information increased most in cutaneous areas 3b/1 and multi-modal area 2.
M1 and 3a uniquely maintained object information throughout grasp, with shifts in encoding.

Conclusions:

Neural coding of object identity dynamically shifts during grasp.
Sensorimotor cortex exhibits complex, changing representations of object identity.