Nervous and Digestive System
Cerebellum – coordination of movement and aspects of motor learning
Cerebrum – conscious activity including perception, emotion, thought, and planning
Thalamus – Brain’s switchboard – filters and then relays information to various brain regions
Medulla – vital reflexes as heart beat and respiration
Brainstem – medulla, pons, and midbrain (involuntary responses) and relays information from spine to upper brain
Hypothalamus– involved in regulating activities internal organs, monitoring information from the autonomic nervous system
Basic functional cell of nervous system
Transmits impulses (up to 250 mph)
Parts of a Neuron
Dendrite – receive stimulus and carries it impulses toward the cell body
Cell Body with nucleus – nucleus & most of cytoplasm
Axon – fiber which carries impulses away from cell body
Schwann Cells- cells which produce myelin or fat layer in the Peripheral Nervous System
Myelin sheath – dense lipid layer which insulates the axon – makes the axon look gray
Node of Ranvier – gaps or nodes in the myelin sheath
Impulses travel from dendrite to cell body to axon
Neurotransmitters – Chemicals in the junction which allow impulses to be started in the second neuron
A stimulus is a change in the environment with sufficient strength to initiate a response.
Excitability is the ability of a neuron to respond to the stimulus and convert it into a nerve impulse
All of Nothing Rule – The stimulus is either strong enough to start and impulse or nothing happens
Impulses are always the same strength along a given neuron and they are self-propagation – once it starts it continues to the end of the neuron in only one direction- from dendrite to cell body to axon
The nerve impulse causes a movement of ions across the cell membrane of the nerve cell.
Epilepsy - common and diverse set of chronic neurological disorders characterized by seizures.
Seizures - the physical findings or changes in behavior that occur after an episode of
Cerebrum – conscious activity including perception, emotion, thought, and planning
Thalamus – Brain’s switchboard – filters and then relays information to various brain regions
Medulla – vital reflexes as heart beat and respiration
Brainstem – medulla, pons, and midbrain (involuntary responses) and relays information from spine to upper brain
Hypothalamus– involved in regulating activities internal organs, monitoring information from the autonomic nervous system
Basic functional cell of nervous system
Transmits impulses (up to 250 mph)
Parts of a Neuron
Dendrite – receive stimulus and carries it impulses toward the cell body
Cell Body with nucleus – nucleus & most of cytoplasm
Axon – fiber which carries impulses away from cell body
Schwann Cells- cells which produce myelin or fat layer in the Peripheral Nervous System
Myelin sheath – dense lipid layer which insulates the axon – makes the axon look gray
Node of Ranvier – gaps or nodes in the myelin sheath
Impulses travel from dendrite to cell body to axon
Neurotransmitters – Chemicals in the junction which allow impulses to be started in the second neuron
A stimulus is a change in the environment with sufficient strength to initiate a response.
Excitability is the ability of a neuron to respond to the stimulus and convert it into a nerve impulse
All of Nothing Rule – The stimulus is either strong enough to start and impulse or nothing happens
Impulses are always the same strength along a given neuron and they are self-propagation – once it starts it continues to the end of the neuron in only one direction- from dendrite to cell body to axon
The nerve impulse causes a movement of ions across the cell membrane of the nerve cell.
Epilepsy - common and diverse set of chronic neurological disorders characterized by seizures.
Seizures - the physical findings or changes in behavior that occur after an episode of