Decoding Brain States for Planning Functional Grasps of Tools: A Functional Magnetic Resonance Imaging Multivoxel...

Area of Science:

• Neuroscience
• Cognitive Neuroscience
• Neuroimaging

Background:

• The praxis representation network (PRN) is typically associated with tool-related actions.
• Traditional neuroimaging methods have limitations in revealing fine-grained neural activity patterns.

Purpose of the Study:

• To investigate neural selectivity for grasp planning using multivoxel pattern analysis (MVPA).
• To explore the role of the left-lateralized temporo-parieto-frontal network in grasp planning.
• To compare MVPA with traditional neuroimaging approaches.

Main Methods:

• Utilized data from 20 participants planning functional grasps of tools with either hand.
• Performed region of interest (ROI) and whole-brain searchlight analyses.
• Applied MVPA to identify task-related neural patterns.

Main Results:

• MVPA identified significant contributions to grasp planning from the anterior intraparietal sulcus (aIPS) and ventral lateral occipital complex (vLOC).
• Increased local selectivity was observed near the superior parieto-occipital cortex and dorsal premotor cortex.
• Neural patterns indicated contributions from areas involved in prospective grasp formation, object property coding, and anticipatory hand postures.

Conclusions:

• aIPS plays a role in prospective grasp formation and encoding tool properties.
• vLOC involvement suggests sensitivity to object properties for grip formation.
• MVPA reveals more fine-grained neural activity patterns compared to traditional methods, enhancing our understanding of grasp planning.