Behavioral Neuroscience Notes
Behavior Neuroscience
- Study of the brain's impact on behavior.
Brain Regions
- Reticular Formation: Includes pain sensitization, alertness, fatigue, sleep, and motivation; contains the cerebellum, midbrain, pons, and medulla.
- Midbrain: Motor movement (eye), auditory and visual processing.
- Cerebellum: Muscle control, balance, and movement.
- Forebrain: Thalamus, hypothalamus, amygdala, hippocampus, and cerebral cortex; planning and execution of movements, sensory processing, regulating sleep-wake states, and behavioral responses to emotions.
- Hypothalamus: Regulates temperature, hunger, thirst, circadian rhythms, and controls the pituitary gland.
- Cerebral Cortex: Outer layer of brain (80%), controls thoughts and perception; divided into frontal, parietal, temporal, and occipital lobes.
- Corpus Collosum: Transfers messages between left and right brain hemispheres.
Neuron Structure
- Dendrites, axons, and cell body.
Glia
- Convert glucose into lactate for neuron energy, feed neurons, guide neurons, strengthen connections, and increase communication speed.
Neurotransmitters
- Chemical messengers carrying signals from one neuron to the next target cell (nerve cell, muscle cell, or gland).
- Excitatory Neurotransmitters: Excite the neuron, passing the message along (e.g., glutamate, epinephrine, norepinephrine).
- Inhibitory Neurotransmitters: Block or prevent the message from being passed (e.g., GABA, glycine, serotonin).
Core System
- One system can have many roles; degeneracy: many combinations of neurons can yield the same result.
James-Lange Theory of Emotion
- Physical changes in the body happen before the experience of the associated emotion.