Central Nervous System
Major functions
Layers of the meninges
Major part of brain and their functions
Names of all lobes and their functions
Spaces and ventricles
Drugs
Classification of Neurons
Major parts and functions of spinal cords
Action potential
Dura Mater- outermost layer, made of dense irregular C.T. with many blood vessels & nerves, attached to periostem
Arachnoid Mate-spider web-like collagen and elastic fiber, thin membrane that lacks blood vessels
Pia Mater- innermost, nearly transparent layer, follows contours of brain and spinal cord
transmits nerve impulse when happening
strong stimulation or nerve impulse causes sodium gates to open and it rushes into the cell causing depolarization.
if strong enough depolarization occur, then threshold potential is reached and impulse it sent down axon
potassium then rushes out of the neuron after sodium rushes in and that cause repolarization of the membrane back to resting poyential
Multipolar-several dendrites and one axon (mostly neurons from CNS)
Bipolar- one main dendrite and one axon (found in special sense organs)
Unipolar- just one process and are always sensory neurons(in axon terminals are always in CNS and cell bodies in ganglia)
foramen magnum- where spinal cord exists the skull (large hole)
Cervical enlargement- where nerves branch off to supply nerve to the upper limb
lumbar enlargement- supplies nerves to the lower limb
conus medullaris- cone shaped area where spinal cord stops.
subdural space- space between dura mater and arachnoid mater
subarachnoid- space between arachnoid and pia mater
Occipital lobe- controls visual area
Temporal lobe- controls auditory area
Frontal lobe- controls the thin king area
Parietal lobe- controls sensory of speech
Cerebrum -controls movement
Diencephalon
Brain Stem-connects spinal cord to diencephalon
Cerebellum- coordination, balance, and posture.
thalamus- plays role in emotions, memory, awareness and cognition
Hypothalamus-controls regulation eating and drinking, controls body temperature
Sensory function- detects changes in and out the body
Integrative Function- makes decisions based on senses and aspects
Motor Function- it may respond to stimuli by initiating muscular contractions or glandular secretions
Alcohol
Anabolic Steroids
Cocaine
Dissociative Drugs
GHN & Rohypnol
Hallucinogens
Heroine
Inhalantants
Marijuana
MDMA
Methamphetamine
Nicotine