What is Dorsal Premotor Cortex?

A frontal cortical region anterior to primary motor cortex that encodes movement planning, target selection, and sensorimotor transformations, providing preparatory signals used in some BCI decoders.

What category does Dorsal Premotor Cortex belong to in BCI?

Dorsal Premotor Cortex is a Neuroanatomy concept in brain-computer interface science.

Dorsal Premotor Cortex — BCI Glossary

The dorsal premotor cortex (PMd) is located on the lateral surface of the frontal lobe, anterior to the arm/hand region of primary motor cortex (M1). PMd is involved in planning reaching movements, selecting movement targets based on sensory cues, and transforming visual target locations into motor commands. Neural activity in PMd reflects where the person intends to reach before the movement begins.

Function

PMd neurons encode:

Movement direction during planning: PMd neurons become active during the delay period between seeing a target and initiating a reach, encoding the intended movement direction before M1 execution signals emerge
Target location: Visual-spatial information about reach targets, reflecting sensorimotor coordinate transformations
Decision variables: When choosing between multiple targets, PMd activity reflects the evolving decision process
Context-dependent mappings: PMd implements arbitrary associations between cues and movements (e.g., "if green light, reach left; if red light, reach right")

BCI Applications

PMd has been a recording target in several BCI studies, both independently and in combination with M1:

Planning-based BCIs: Decoding intended reach targets from PMd delay-period activity before the movement begins, enabling predictive (rather than reactive) control
Combined M1 + PMd: Some BCI systems record from both M1 (for ongoing movement execution) and PMd (for upcoming movement planning), enabling smoother transitions between sequential actions
Cognitive BCIs: PMd decision-related activity could be used to decode choices and intentions beyond simple motor commands

Distinction from M1

While M1 primarily encodes the kinematics and dynamics of ongoing movement (velocity, force), PMd encodes the goals and plans for upcoming movements. In BCI terms, M1 signals are better for continuous real-time control (cursor tracking), while PMd signals may be better for discrete target selection and movement initiation. The two regions provide complementary information that can improve BCI decoding when combined.