What is Premotor Cortex?
The premotor cortex is the region of the frontal lobe just anterior to the primary motor cortex (M1). It plans and sequences movements, integrates sensory-guided action, and — in the ventral premotor area — contains mirror neurons.
Key Functions
- •Movement planning — prepares actions before execution
- •Sensory-motor integration — links perception to action
- •Mirror neurons — fire when observing and performing actions
- •Sequencing — coordinates multi-step movements
Why does the Premotor Cortex matter?
The premotor cortex matters because it helps plan and prepare movements before they happen. It sits just in front of the primary motor cortex and shapes actions based on goals and sensory cues.
This region is especially important for movements guided by what we see, such as reaching and grasping, and for putting sequences of actions together. It also contains neurons that respond when watching others act, a finding studied in relation to imitation.
What happens when the Premotor Cortex goes wrong?
When the premotor cortex is damaged, basic strength often remains, but planning and organizing movements becomes harder. People may have trouble selecting the right action in response to a cue, coordinating the two sides of the body, or carrying out learned movement sequences.
Damage in this area can contribute to apraxia, where a person struggles to perform purposeful movements on command despite understanding the task. Injury to premotor areas on the left side can also affect speech production, since they lie near regions involved in language. The idea that faulty "mirror neurons" explain conditions such as autism was once popular, but the evidence for it is weak and contested.
In ONDA Life
Part 6 describes the "Mirror Neuron System (Premotor Cortex)" as "your biological Wi-Fi" — training the ability to instantaneously read the intentions and states of others through micro-expressions and gestures.