Question

How does a hockey player’s brain process and execute a decision in 0.2 seconds when receiving a pass at 100km/h? Map out the neural pathways involved.

Answer 1

A pass travelling at 100 km/h covers about 5.6 m in 0.2 seconds, so the player must rapidly interpret the ball’s movement and prepare an action, often using anticipation and practiced responses.

Neural pathway

1. See the pass: Light from the ball is detected by the retina. Signals travel along the optic nerve to the thalamus and then to the visual cortex in the occipital lobe.
2. Judge the ball and situation: Visual areas, including the parietal cortex, help estimate the ball’s direction, speed and position relative to the player and teammates. Memory and experience help predict where it will arrive.
3. Select a response: The brain’s decision-making and action-selection networks, including the prefrontal cortex and basal ganglia, help choose whether to trap, pass, dribble or shoot. The cerebellum helps coordinate timing and movement.
4. Prepare and send the movement command: Premotor areas and the supplementary motor area prepare the action; the primary motor cortex sends commands down the corticospinal tract to spinal motor neurons, which activate the relevant muscles of the arms, hands, trunk and legs.
5. Adjust while moving: Touch and proprioceptive feedback from the hands, muscles and joints, together with continuing visual information, help the cerebellum and motor areas fine-tune the stick movement and body position.

Pathway at a glance: Ball → retina → optic nerve → thalamus → visual cortex → spatial analysis and prediction → action selection → premotor and motor cortex → corticospinal tract → spinal motor neurons → muscles → controlled reception or play of the ball.

The ball’s approximate travel during the response window is:

\[\text{distance}=\text{speed}\times\text{time}=27.8\ \mathrm{m,s^{-1}}\times0.2\ \mathrm{s}\approx5.6\ \mathrm{m}\]

These processes overlap and are not a rigid sequence with identical timings for every player. Practice makes recognition and movement selection more efficient, allowing some of the response to be prepared before the ball arrives.