4201861
Descripción
Mapa Mental por Colleen Curley, actualizado hace más de 1 año
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Creado por Colleen Curley
hace casi 9 años
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Nervous system
- Functions
- Sensory input
- Integration
- Homeostasis
- Mental Activity
- Control of skeletal muscle
- Sensory input
- Central Nervous System
- Brain and spinal cord
- Brain and spinal cord
- Peripheral Nervous System
- 31 pairs of spinal
nerves and all neural
tissue outside of CNS
- 12 Thoratic nerves
- 5 Lumbar nerves
- 1 coccygeal nerve
- 5 sacral nerves
- 8 cervical nerves
- 12 Thoratic nerves
- 12 pairs of
cranial
nerves
- Afferent division
- Sensory info to CNS via
ascending pathway
- Sensory info to CNS via
ascending pathway
- Efferent division
- Motor info to glands
and muscles via
descending pathway
- Somatic
nervous system
- Skeletal muscle
- Skeletal muscle
- Autonomic muscle system
- Smooth muscle,
Cardiac muscle,
Glands
- Sympathetic
- Ganglion close to CNS
- Ganglion close to CNS
- Parasympathetic
- Ganglion close to organ
- Ganglion close to organ
- Smooth muscle,
Cardiac muscle,
Glands
- Motor info to glands
and muscles via
descending pathway
- 31 pairs of spinal
nerves and all neural
tissue outside of CNS
- Cellular organisation in
neural tissues
- Neurons
- Communication
- Large, prominent centrally located
nucleus, lot of mitochondria, lot of
Nissl bodies (RER) for
neurotransmitter production
- Axons
- Long cell process
- Single structure or
branch= collateral axons
- Carry impulse
away from body
- Long cell process
- Dendrites
- Short, highly branching
cytoplasmic extenstion
- Sensory messengers
to be processed
- Short, highly branching
cytoplasmic extenstion
- Cytoskeleton
- neurofilament- architecture
- Microtubules - axinal transport
- neurofilament- architecture
- Synaptic terminals
- Synapse
communication with
other cell
- Synapse
communication with
other cell
- Communication
- Neuroglia
- Support, Defence and
Myelination (insulation)
- Oligodendrocytes
- Myelination in CNS
- Myelination in CNS
- Astroglia
- White matter - fibrous astrocyte
- Grey matter protoplasmic astrocyte
- White matter - fibrous astrocyte
- Microglia
- Phagocyte in CNS
- Phagocyte in CNS
- Ependymal cells
- Cubodial or low columnar lining in central
spinal canal, no basement membrane, lining
ventricles in cerebrum rest on basement
membrane and secrete cerebral spinal fluid
- Cubodial or low columnar lining in central
spinal canal, no basement membrane, lining
ventricles in cerebrum rest on basement
membrane and secrete cerebral spinal fluid
- Schwann cells
- Myelination in PNS
- Support non-myellinated axons
which bury themselves into the
schwann cell cytoplasm
- Myelination in PNS
- Support, Defence and
Myelination (insulation)
- Neurons
- Functional classifications
- Sensory
- Unipolar - single neuron process from cell body
- Unipolar - single neuron process from cell body
- Interneurons
- Bipolar neuron - 1 dendrite, 1 axon
- Bipolar neuron - 1 dendrite, 1 axon
- Motor
- Multipolar- single axon, many dendrites
- Multipolar- single axon, many dendrites
- Sensory
- Spinal reflexes
- Stimulus
Receptor
Sensory neuron
Motor neuron
Effectors
Response
- No interneuron in
reflex arc of knee jerk
- Stimulus
Receptor
Sensory neuron
Motor neuron
Effectors
Response
- Myelin
- Spiral of membrane
wrapped around axon
- Increase speed
of conduction
along axon
- Space between small units =
nodes of Ranvier
- Multiple sclerosis, myelin of CNS attacked by immune system,
destruction results in severe functional deficits, such as
paralysis, loss of sensation and/ or loss of coordination
- Spiral of membrane
wrapped around axon
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