Voluntary Motion -Karius Flashcards
Cortical areas associated with voluntary motion?
- Primary motor cortex
- Supplementary motor cortex
- Pre-motor cortex
- Pre-frontal cortex and parietal cortex (lesser extent)
Role of dorsal visual pathway in voluntary motion
- Enables body to complete motor acts based on visual input (allows you to reach for and grasp objects)
Premotor cortex
- Receives sensory info required to move (F4 and F5)
- Dorsal applies the rules that determine whether its appropriate to move
- Identifies the intent of the motion and decides what motion to produce
Supplementary Motor Cortex contents
- Supplemental motor area (postural control)
- Pre-supplementary area (plans motor program required to make action occur)
Supplementary Motor Cortex roles
- Organize motor sequences
- Acquire motor skills
- Executive control (switch actions/strategies)
How is the primary motor cortex arranged?
In columns (each column is associated with a specific movement)
Primary motor cortex roles
- Controls specific movements
- Especially important in fine motions (upreg in areas of high representation)
What happens if area controlling fine motion is stimulated?
May produce contraction of a single muscle
What happens if area controlling general motion is stimulated?
May produce contraction of a group of muscles
Which layer of primary motor cortex receives sensory input?
Layer 4
What layer is responsible for output of CST?
Layer 5
What do neighboring columns control?
Related motions, not neighboring muscles
What are the two kind of columns?
- On/off for agonist
2. On/off for antagonist
Role of cerebellum?
- Sequence complex actions
- Correct force/direction
- Balance and eye movements
- Learning of complex actions
Central region (vermis) of spinocerebellum responsible for…?
Postural control
