Reaction Times
Which sense would result in the fastest reaction time?
What is touch?
Receive impulses from other neurons
What are dendrites?
voltage of a neuron at rest
what is -70mV?
increases the chance for an AP to occur
What is excitatory?
brain and the spinal cord
What is the Central Nervous System?
Between visual and auditory, this one is typically faster
What is auditory?
Transmit impulses away from the cell body
What is the axon?
The outside of a neuron at rest
what is positive?
less likely to have an AP
What is inhibitory?
This PATHWAY carries signals from the effectors to CNS
What is afferent?
Eyes register the stimulus and send the signal to this lobe
What is the occipital lobe?
Stores the cell's hereditary material, or DNA, and it coordinates the cell's activities
What is the nucleus?
if the threshold is met... this occurs
Effects: Pleasure, Euphoria, Reward-centers, addiction, positive reinforcement, movement and posture
What is dopamine?
Involuntary response control
Name 2 factors that can impact reaction times
What is age, gender, activity level, distraction, type of stimuli, etc?
Supports nerve regeneration
What are schwann cells?
the potential to carry an electrical current because there is a difference in charge
What is membrane potential?
Most common inhibitor in adult brain
What is GABA?
"rest and digest"
This movement is in response to a stimulus. It is INVOLUNTARY and quicker than a reaction
What is a reflex?
Speed up propagation of action potentials
What are nodes of ranvier?
these ions flow into the cell during depolarization, these ions flow out during repolarization
what is sodium and potassium?
Effects: Sleep, mood, appetite, pain, body temperature
Low levels linked to depression, suicide, impulsive behavior, and aggression
What is serotonin?
voluntary movement control
What is the somatic nervous system?