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Emily Flores P.2 Nervous system - Coggle Diagram
Emily Flores P.2 Nervous system
Tissues
Neurons are nerve cells that hold structure
Central Nervous Neuroglia Functions
: fill spaces, protect, structurally support , and insulate neurons
Peripheral nervous system Neuroglia functions:
Structural support/formation of the blood-brain barrier
Disorders/Diseases
Meningities
Multiple sclerosis
Spinal Cord Injury
Alzheimer disease
Autism
Cerebrovascular Accident (stroke)
Connective Tissue Coverings
Perineurium
: covering around bundles of nerve fibers.
Endoneurium
: covering around individual nerve fibers
Epineurium
: outer covering of a nerve
Cranial nerves
Controls subconscious activities
Mostly mixed nerves
Neurotransmitters
Dopamine (CNS)
: sense of feeling good
Serotonin (CNS)
: Sleepiness
Acetylcholine (CNS)
: Controls skeletal muscle actions
Action potential & the Nerve Impulse
Action Potential
occurs when charge reaches -55mv
all neurons are the same strength
A.P. reached when calls respond by returning to resting potential of -70mv
Nerve Impulse
respond to stimulus
Spinal nerves
2 roots
Motor ventral root
Sensory Dorsal root
5 pairs of sacral nerves
5 pairs of lumbar nerves
31 pairs of spinal nerves
8 -cervical nerves
12- thoaratic nerves
1 pair of coccygeal nerve
Classification of neurons
Neurons are cells that communicate, with electrical impulses, with other neurons/tissue.
Reflex arc
Function: Provide the basis for involuntary actions called reflexes
A sensory neuron, that carries the information from a receptor toward the CNS.
An interneuron in the CNS (reflex center)
A motor neuron, that carries a command to effectors
An effector (muscle or gland that carries out the reflex) that responds to the initial change
Major parts and functions of the spinal cord
31 segments , each connect to a pair of spinal nerves
spinal nerves
white matter
Major Functions: transmit impulses to and from the brain;to house spinal reflexes. Ascending tracts carry sensory information to brain
Major parts and functions of the brain
Gyrus/hills on brain
Longitudinal Fissure runs straight down the middle of the brain
Motor Cortex/Function:controls voluntary movements
Broca's area/Function:Speech
Occipital lobe/Function:helps analyze visual patterns and images
Frontal Lobe/Main Function: problem solving
Parietal Lobe/Function:senses,touch,taste,hearing,sight,and smell.
Temporal Lobe/Function:process emotions and reactions
"Pre-motor" Area/Function:plans movement
Sensory Cortex/Function: receives sensations such as pain, touch, pressure, and temperature.
Compare & contrast the autonomic nervous system
Major functions of the nervous system
Sensory Function
Integrative function
Motor Function
Effectors
Drugs of abuse
Heroine
Ecstasy
Marijuana
Methamphetamine
Alcohol
Cocaine
LSD