Week 4 Lectures Flashcards
(27 cards)
What is the purpose of the dexterity article?
It defines motor and sensory pathways of hand dexterity. It also details hand dexterity and organism stimuli
What are spinal roots?
Bring in new information
What are dorsal roots?
Brining sensory information in
What is the purpose of ventral roots?
Brings in motor information out
What is damaged when a person cannot move something?
ventral roots
What is dexterity?
skilled behavior by hand
What is the purpose of vision?
It helps in preparing motor responses such avoiding something. It also relays stimuli
What is the purpose of the motor cortex?
the area that controls motor movement
What is the neuromuscular junction?
The connection between neuron and muscle
How does the motor cortex work?
It works through the peripheral system that relays information through the muscles. Also works through chemical and electrical signals.
How many muscles control hand movement?
20 muscles
What is the somatosensory cortex?
It interprets touch and feedback comes from peripheral system and sensory root
What is the cerebral cortex?
The brain’s is the outer layer
What does the cerebral cortex surround?
It surrounds earlier evolved midbrain and brainstem
How far does the brainstem extend?
Brainstem extends to the spinal cord
How do neurons exit in the primary motor cortex?
motor neuron axon roots exit spine
What is the primary motor cortex?
Controls the voluntary movements of an organism
How does the primary motor cortex work?
sends long axons down spinal cord
What are skin receptors?
Skin receptors are the main input that receive information.
What is the somatosensory cortex?
Receives sensory information from stimuli
How do skin receptors work?
Enters from skin receptors and then up to the spinal cord and lastly in the brain. Brain tells muscles to move.
What are some of the most sensitive areas according to the homunculus?
According to the homunculus, the areas that are the most sensitive is the tongue and hands
What is the cortical homunculus?
A distorted drawing of the human body(psych).
What is the function of the homunculus?
It denotes area of the brain’s cortex devoted to body regions.
