Unit 3
Brain's Lobes
Frontal Lobe: involved in speaking and muscle movements and in making plans and judgements
Parietal Lobe: receives sensory input for touch and body position
Temporal Lobe: auditory areas receiving info mostly from the ears
Occipital Lobe: includes areas receiving visual information
Systems:
Nervous System
Neuron: building block of the nervous system
Axon: Sends out information in the form of neurotransmitters
Dendrite: Receives information from other neurons and will send its own info with an action potential
Soma/Cell Body: Center of neuron with branching off dendrites and axons
Myelin Sheath: Covers axon to increase speed of the message being communicated
Central: Brain and Spinal Cord
Peripheral: Gathers and transmits information from the CNS to the body
Autonomic: controls self-regulated action f internal organs or glands
Somatic: controls voluntary movements of skeletal muscles
Sympathetic: Increases heart rate and blood pressure
Parasympathetic: decreases heart rate and blood pressure
Brain
Brainstem: oldest part and core of the brain
Medulla: regulates breathing and heartbeat
Thalamus: sensory control center;directs messages to the sensory receiving areas in the cortex
Reticular Formation: nerve network in the brainstem that mainly controls arousal
Limbic System: neural system located beneath the cerebral hemispheres
Amygdala: controls emotion; mainly fear and anger
Hypothalamus: controls urges; hunger, sexual, etc.
Hippocampus: maintains and produces conscious memories