Test 3 Flashcards
What is React
Sending out motor commands
What Processes information
Inter neurons
What are Neurons purpose
Send and receive signals
Neuroglia is defined as?
Cells that support
What is included in the Central nervous system
Brain spinal cord
What is included in the Peripheral nervous system
Sensory, nerves
Afferent division- sensory info., begins with receptors
Efferent division- motor info., terminates with effectors
Enteric nervous system includes?
Digestive system
Somatic nervous system includes?
Skeletal muscle
Autonomic nervous system is identified as?
And includes two effects
In charge of sending things that we don’t have control of.
Sympathetic- stimulating effect
Parasympathetic- relaxing effect
Axon is defined as?
Connector tubes on a cell that sends and delivers messages
Telodendria is defined as?
Synaptic terminals
Nissl bodies is defined as?
Concentration of ribosomes, gray matter
Dendrites purpose is to?
Receive information from other neurons
What are Inter neurons involved in?
Involved in higher functions
Unipolar is defined as?
Only acts as sensory neurons
Glial cells
Supporting cells that make up half the volume of the nervous system
Astrocytes
Maintain blood-brain barrier
Oligodendrocytes
Myelinate CNS axons
Microglia
Removes cell debris by phagocytosis
Ependymal cells
Line ventricles, produce and regulate CSF
Myelin
Speeds up action potential
Satellite cells
Maintenance
Schwann cells
Form myelin sheaths around peripheral axons
Graded potential
Temporary localized stimulus
Action potential
An electrical signal
Threshold
Value at which action potential is sent
Propagation
Action potential moving down the cell
Depolarization
Extreme positive
Repolarization
Extreme negative
Continuous propagation
Continuous, sense there is no myelin
Saltatory propagation
Jumps from node to node
Area of polarity reversal
Nodes that jump from myelin sheath
Presynaptic cell
Neurons that sends messages
Postsynaptic cell
Cell that receives message
Chemical synapse
Neurotransmitters are released across the cleft
Are not directly connected
Electrical synapse
Connected
Cells that are joined for ions to pass from one cell to another
Four parts of the Central nervous system
Cerebrum
Diencephalon
Brain stem
Cerebellum
Cerebrum
Coordination
Emotion
Memory
Gyri (type of grey matter)
Ridge
Sulci (type of gray matter)
Dip
Parietal lobe
Somatosensation
Somatosensation
Sensory info coming from body
Proprioception
Knowing where body parts are in 3D form
Occipital lobe
Primary visual cortex
Temporal lobe
Processes smell and hearing
Frontal lobe
Motor cortex
Precentral gyrus
Most motor stuff comes from here
Premotor area
Thinking about movements to be made
Frontal eye field
Controls eye movements
Broca’s area
Controls movements for speech
Visual association area
Interprets activity and visual cortex
Auditory association area
Interprets activity and auditory cortex
Somatic sensory association area
Interprets activity in primary sensory cortex
Somatic motor association area
Coordinates motor responses of learned movements
Basal forebrain
Acetylcholine production for the brain
Basal nuclei
Control general body movements
Pineal gland
Regulates sleep wake cycle’s
Thalamus
Relay hub, processes info going in and out
Hypothalamus
Gate keeper of homeostasis
Midbrain
Coordinate sensory information
Superior colliculi
Visual information
Interior colliculi
Auditory information
Pons
Motor commands
Medulla
Regulates autonomic functions
Cerebellum
Adjusts postural muscles of the body
Alpha waves
Relaxed
Beta waves
Concentrating
Theta waves
Seen in children and in intensely frustrated adults
Delta waves
Large amplitude, low frequency waves
White matter
Myelinated axon’s
Gray matter
Contains cell bodies mainly
Ascending tracts
Sensory
Descending tracts
Motor
Four spinal nerves
Cervical, brachial, lumbar, sacral
Name the two spinal nerve roots
Ventral, dorsal
What are the three connective tissue layers of the spinal nerve
Epineurium
Perineurium
Endoneurium
Epineurium
Outer layer of tissue on the spinal nerve
Perineurium
Middle layer of tissue on the spinal nerve
Endoneurium
Inner layer of tissue on the spinal nerve
First order neuron
Sensory neuron delivers sensations to the CNS
Second order neuron
Axon of the sensory neuron synapses on an interneuron in the CNS
Third order neuron
Gets it to the consciousness
Posterior column pathway
Fine touch
Spinocerebellar pathway
Proprioception
Corticospinal pathway
Voluntary control
Medial pathway
Control of muscle tone and gross movements
Lateral pathway
Control of muscle tone and precise movements