W3 nervous system Flashcards
what is the CNS made of
brain
spinal cord
what is the PNS made of
autonomic NS
somatic NS
what is the autonomic NS
sympathetic + parasympathetic NS
what’s the 3 function of CNS
takes info from environment
motor response
store sensory info
how many cranial nerves in PNS
12
how many spinal nerves in PNS
31
where does the sensory PNS take info to
periphery to CNS
where does the motor PNS take info to
CNS to periphery
what is the somatic NS
control of skeletal muscles
what is autonomic NS
control of heart and blood vessel
which vertebrae level are the sympathetic nerves found
T1-L2
which vertebrae level are the parasympathetic nerves found
S2-S4
what’s the diff between motor and sensory neurone
cell body in sensory is separate from dendrite
where is somatic system distributed to
musculoskeletal and skin
where is visceral system distributed to
organs
what is white matter in spinal cord
collection of axon fibres
where is white matter in spinal cord
lies superficial in deep places
how many cervical nerves are there
8
how many thoracic nerves are there
12
how many lumbar nerves are there
5
how many sacral nerves are there
5
how many coccygeal nerves are there
1
where do the spinal nerves bunch togethether and what is it called
below L2/3 called cauda equina
what are the 3 meninges layers
dura mater
arachnoid mater
pia mater
what separates the left and right cerebral hemispheres
falx cerebri
what is a dermatone
area of skin which receives sensory supply from 1 spinal nerve
what is a myotone
group of muscles controlled by a spinal nerve
what is C4
shoulder
what is C6
thumb
what is C7
middle finger
what is C8
little finger
what is T4
nipples
what is T10
umbilicus
what is L1
inguinal
what is L3
medial knee
what is L5
big toe
what is S1
little toe
what is S3
gluteal
what is S5
anal canal
whats the role of spinal tracts
neural pathways which carry info
whats the role of the ascending spinal tract
carry sensory info from the periphery
whats the role of the descending spinal tract
carry motor info
what is the job of DCML
fine touch sensory
what is the job of spinothalamic tract
carry pain
what is the job of corticospinal tract
voluntary motor function
what is decussation
crossing spinal tracts from 1 side of brain/spinal cord to another
where does the spinothalamic tract decussate
level of spinal cord
where does the DCML decussate
medulla oblongata
where does the corticospinal tract decussate
spinal cord and medulla
what level is the cervical plexus
C1-C5
what level is the brachial plexus
C5-T1
what level is the lumbar plexus
L1-L4
what level is the sacral plexus
L4-S4
what does it mean when the brain gyrus
folds outwards
what does it mean when the brain sulcus
folds inwards
what is the longitudinal fissure of the brain
midline of the brain
what is the cerebrum made of
frontal lobe
temporal lobe
occipital lobe
parietal lobe
whats the left side of the brain for
analytical thinking
whats the right side of the brain for
emotions
whats the broca area for
language
whats wernickes area for
understanding language
what are the 4 arteries which supply blood to your brain
Right Internal Carotid Artery
Left Internal Carotid Artery
Right Vertebral Artery
Left Vertebral Artery
what do the 4 arteries that supply brain blood form
circles of willis
where does the venous drainage of the brain
transverse sinus to jugular vein
what is the role of the cerebellum
fine movement and posture
what does the central sulcus divide
post and pre central gyruses
