8 Nervous System (Lecture) Flashcards
Autonomic motor
Involuntary
Inter neuron
Communicates within the CNS. Cognition
Somatic Motor
Voluntary
Efferent Neurons
Toward PNS Motor
Visceral Sensory
Unconscious
Somatic Sensory
Conscious
Afferent Neurons
Toward CNS Sensory
Epyndynal
Neuroglia of the CNS
Removes plasma from the blood to produce CSF
Oligodendrocytes
Neuroglia of CNS
Same as Schwann cells (Neurolemmocytes)
Protect and wrap around axon (myelin sheath)
Microglia
Neuroglia of the CNS
Phagocytes engulf cellular waste and pathogens
Astrocytes
Neuroglia of the CNS
Maintain blood brain barrier. Keeps out hormones and amino acids.
Neurolemmocytes
Neuroglia of the PNS
Schwann cells wrap around the axon. Myelin sheath.
Satellite cells
Neuroglia of the PNS
Found around the nerve cell body
Parasympathetic
Rest and digest
Sympathetic
Fight or flight
Autonomic
Reflex not conscious
Somato
Refers to things that are conscious
Dendrites
Receives chemical signals and converts them to electrical signals. Autonomic neuronal process
Axons
Transmits electrical signals. Only axons have synaptic terminals.
Autonomic neuronal process
Unipolar neurons
Sensory. 1 projection from cell body. All are sensory.
Autonomic Neuronal process
Bipolar neurons
(Retina). 2 projections from cell body.
Autonomic neuronal process
Multipolar neurons
Motor. Many projections. Motor and inter euro a are multipolar
Autonomic neuronal process
Receptive Zone contains…
Dendrites. Receivers if chemical signals and converters to electrical signals.
Trigger Zone contains…
Soma- nerve cell body
Axon Hillock - where axon meets soma
Conduction zone contains…
Axons & Nerves
Secretory zone contains…
Synaptic terminal
Synapse
Dendrite/muscle/gland
ACH
Acetylcholine is an NTR that is used by the parasympathetic NS to stimulate skeletal muscle.
Norepinephrine
is an NTR used by the sympathetic NS to increase HR, BP, BR
Dopamine
Is a NTR used by the CNS in the reward center of the brain.
Serotonin
Is a NTR associated with mood and hunger
GABA
Is a NTR associated with fear and anger.
White matter
Myelinated axons
Gray matter
Nerve cell bodies
Gyrus
Elevated structures at the surface if the brain
Sulcus
Groove structures on the surface of the brain
Fissure
Deep gap on the surface of the brain
Cerebrum
Largest part of the brain. Divided into L&R hemispheres
Cerebral cortex
Dark outer edge controls all conscience activity
Frontal lobes
Problem solving, cognitive activities
Central sulcus
Separates frontal and parietal lobes
Primary motor cortex
Voluntary behavior starts
Insula
Continuously aware of taste and smell
Temporal lobes
Anaylize auditory information.
Occipital Lobes
Eyes convert light into electrical signals the brain can understand
Language centers
Left side of brain includes speech center and interpretive area
Speech center
Broca’s area produces speech controls muscles of speech
General interpretive area
Wernicke’s area controls hearing and words
The lymbic system
Emotional states
Cingulate gyrus (limbic cortex)
Expressing emotion
Fornix
Channel for emotional info
*Hypothalmus
Regulates homeostatic functions
Osmoregulatory center
Thirst
Mammillary body
Controls eating and swallowing
Amygdala
Controls fear and anger
Hippocampus
Converts short term to long term memory
Septum pellucidum
Separates L and R ventricles
Choroid plexus
Network of blood vessels where CSF is produced
Pineal gland
Regulates circadian rhythms
Thalamus
edits and routes nearly all incoming sensory information
Optic chiasm
Where the 2 optic nerves partially crossover
Midbrain
occulomotor reflex center
Superior colliculi
Controls movement of your eyes as you track a moving object
Inferior colliculi
Controls shape of lens and size of pupil
Reticular formation
Controls levels of contiousness
Pons
Part of brain stem
Egg shaped
Controls urinary reflex
Cerebral aqueduct
Channel for CSF between 3rd and 4th ventricles
Cochlear reflex
Balance
Emesis reflex
Vomiting
Cerebellum
Controls highly skilled practiced behaviors
With nerves like vessels
Blue is …
Red is …
Blue is sensory
Red is motor
Prefix spinal indicates
Motor tracts
Prefix spino indicates
Sensory tracts
Finiculos
White matter around the cord
Dorsal white columns (funiculi)
Sensory touch proprioception kinesthesia
Anterior white columns (funiculi)
Relay ANS motor info
Lateral columns (funiculi)
Relay somatic motor info
Gray matter of spinal cord
Butterfly in central cord
Dorsal horns
Sensory
Lateral horns
Autonomic
Ventral horns
Voluntary motor
Commissure of spinal cord
Line between butterfly wings (info crossover)
Anterior median fissure of spinal cord
A gap that separates L and R spinal cord
What level does the cord end
L1
- Conus medullaris of spinal cord
Where spinal cord narrows to a point
- Cauda equina of spinal cord
Many strands of the cord below L1
- Filum terminale of spinal cord
Connects to coccyx holds cord in place
Rootlets
Nerve fibers that connect directly to the spinal cord
Nerve roots
Formed by the merger of rootlets
How many pairs of spinal nerves
31
Sympathetic nerves exit the spine at
T1 to L1
Which NTR is used by the sympathetic NS
Norepinephrine
Lateral para vertebral ganglia
Nerve cell bodies that parallel the colum
Anterior collateral ganglia
Nerve cell bodies that are anterior to the cord and control digestion
Which NTR is used by the parasympathetic NS
ACH
Parasympathetic nerves exit the spine at
S2 - S4
Target organ ganglia
Nerve cell bodies that are close to the organs they serve
Intramural ganglia
Nerves cell bodies with in the organ they control
I Olfactory
Smell
II Optic
Vision
III Occulomotor
Size of pupil shape of lens
IV Trochlear
Depress eyes (look down)
V Trigeminal
Corneal Reflex (blinking)
VI Abducens
Rotates eyes
VII Facial
Controls tears and salivary glands
VIII Vestibulocholear
Hearing and Balance
IX Glossopharengeal
Swallowing
- X Vagus
HR BP Digestion
XI Acessory
Turn your head
XII Hypoglossal
Movement of tongue