nervous system II
Terms
undefined, object
copy deck
- this is secreted by choroid Plexues (capillaries in ventircles), its clear, similar to blood plasma, produced by lateral ventricles
-
Cerebrospinal fluid in the CNS
- is CSF in the CNS or PNS
- CNS
- CSF- does what and where is it sampled
- support, absorbs shock and provides nutrients. spinal tap L-4
- protected by bone, meninges, csf
-
cns-spinal cord
- where does the cns spinal cord extend to and how long is it?
-
medulla oblongata to L2. 16-18 inches
-
name the two enlargements (limb control) of the CNS-spinal cord
-
cervical (shoulder and arms) and Lumbar (pelvis and legs)
-
conus medullaris is the inferior tip of spinal cord cauda equina- nerve roots interior to cord tip (lumbar) filum terminale- pia mater attached to coccyx
-
yes yes yes
- what is Outer White Matte?
-
bundles of myelinated Axons
-
What are ascending tracts or pathways? motor or sensory? and do they go to CNS or PNS?
-
Sensory, from sensory receptors to CNS
- what are Descending tracts or pathways? motor or sensory? do they go FROM CNS or PNS
- Motor, From CNS to glands or muslces
- what is inner gray matter
-
neuron cell bodeis and unmyelinated processes
-
dorsal and ventral horns projects towards outter or inner surface? and they are apart of what color
-
outer. inner gray matter
-
dorsal gray horn is an- and apart of what color
-
interneuron somas and apart of inner gray matter
-
ventral gray horn is a- and apart of inner gray matter
-
somas of motor neurons
-
how many pairs of spinal nerves
-
31 (PNS)
- name the spinal nerves (and which direction they moves)
-
snesory: dorsal root/ascending tracts
motor : ventral root, descending tracts
-
what are dermatomes-
- skin segments supplied by spinal nerves
-
The PNS consists of peripheral nerves (3)
-
cranial nerves, spinal nerves and nerve plexuses
-
PNS consists of peripheral nerves and
- ganglia
-
PNS carries what and what kind command?
-
carries sensory info and motor commands
- NERVES 3 (PNS)
- SENSORY- carries from receptor toward CNS MOTOR- carries from CNS towards effector MIXE
- PNS- has bundles of..HAS S M M and CT reinforced
- AXONS
-
CT reinforced is PNS Nerves (3) early chapter
- endoneurium- surrounds each axon Perineurium-around groups of axons &n
-
PNS -cranial nerves how many pairs
-
12
-
in the cranial nerves (PNS) where does I arise
-
from the cerebrum
-
II-XII from which part of brain
- brainstem
-
function of PNS cranial nerves are
-
sensroy motor and mixes
-
31 pairs of spinal nerves, are the sensory motor or mixed?
- 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, 1 coccygeal all are MIXED; both sensory(Af) and Motor(Ef)
-
PNS-Nerves Plexuses (spinal nerve branches)
-
cervical brachial lumbar and sacral
-
reflex arcs is a simple or hard conduction? and results in slow or fast and automatic or innamatic response
- simple conduction pathway, results in reflex fast automatic motor response
- 5 components of a reflex arc
- receptor-end of dendrite (sensory neuron) Sensory Neuron (receptor to cns) &
-
recetpr, sensory neuron, interneuron, motor neuron and effector are
-
reflex arc
- Voluntary, controls skeletal muscles, neurotransmitter, cell body in CNS and axons extend to skeletal muscles
-
PNS -Somatic Nervous system
- Involuntar, Motor/Efferent, chain of 2 motor neurons recieves info from cns and regulates cardiac muscle, smooth muscle and glandular activity
-
PNS Autonomic nervous system (ANS)
- PSN-ANS antagonistic branches that serve same organs
- Parasympathetic "housekeeping" conserves energy, incresed gastrointestina, decreased heart rate
-
PNS-ANS continued
-
Sympathetic "fight or flight" expends energ. thoracolumbar origin. inhibition of GI activity constricted blood vessels