Nueroanatomy Flashcards
Learn brain divisions and area meanings
Nervous system
CNS
PNS
Central nervous system
Brain and Spinal cord
Peripheral nervous system
Somatic nervous system
Autonomic nervous system
Somatic nervous system
environmental interaction and movement control
- Afferent = PNS to CNS
- efferent = CNS to PNS
Autonomic nervous system
regulation of internal states such as tiredness and digestion
efferent nerves split into parasympathetic (reserves energy) and sympathetic (uses energy)
Scalp
skin subcutaneous connective tissue Galea aponeurotica loose areolar tissue pericranium
Skull
22 bones (8 cranial, 24 facial)
Cranial fissures
parietal bone
frontal bone
temporal bone
occipital bone
Fontanelles
baby skull movements
Skull Foramina
sinus holes
Meninges
Dura mater
Arachnoid membrane
Sub-arachnoid space filled with CSF
pia mater
Cerebral Hemispheres
Right and left side switch over
Contralateral
Ipsilateral
opposite side
same side
Anatomical Directions
Back
posterior
caudal
front
anterior
rostral
back (dorsal) front (ventral) in cerebellum
top
dorsal
superior
bottom
inferior
ventral
Planes of section
sagittal (side on)
Coronal (back head)
Axial ( bird view)
Dividing the brain
Frontal lobe Parietal lobe Occipital lobe temporal lobe cerebellum
Sulcus
separates lobes
Gyri/sulci
increases cortical volume
Post central Gryus
Somatosensory functions (left side)
Precentral gryus
Motor functions (right side)
Frontal lobe
Decision and problem solving
inhibition
Occipital lobe
Primary visual cortex
visual association areas
parietal lobe
somato tactile processing
sensory integration
Somatosensory association
Temporal lobe
primary auditory cortex
Speech
Auditory association
Cerebellum
Coordination of voluntary motor movement
hemispheric asymmetry
left side language
right side speech and motor movements
damage is contralateral
commisural pathways
connect regions of hemispheres
midbrain
cerebellum
spinal cord
corpus callosum
largest commisure
axons link regions
especially tacticle movement
corpus callosum 2
fibres run into frontal lobes from genu and fibres from both sides form a forceps minor (fork structure)
corpus callosum 3
fibres run into occipital lobe in a forceps major
callsoectomy
severe epilepsy procedure stopping hemisphere info transfer acting as two separate brains
chimeric figures
focus on dot and asked to point to complete picture and would point towards one side but say another
disconnection syndrome
agraphia is no langauge access and no left hand writing ability
anomia cant name left hand objects but can in right hand
unilateral apraxia
verbal instructed task with right hand but not left
verbal anosmia
cant name smells to right nose, left hand identifies objects
disconnection syndrome 2
non dominant hand has own mind and isnt supressed by dominant hand
spacial decoupling
can draw two different shapes at same time
anterior commissure
bundle of nerve fibres for sensation and pain
visual and auditory information transferred between temporal lobes
hippocampal commissure
memory
habenular commisure
dopamine/ serotonin regulation
posterior commisure
bilateral pupillary light reflex
association fibres
connect regions of cerebral cortex in one hemisphere
projection fibres
in white matter to terminate matter (white/grey)
white matter
60% brain volume myleinated
grey matter
unmyelinated 40% nerve cell bodes processing concluded here cerebral cortex largest for grey matter
CNS myelination
oligodendrocyte
PNS Myelination
schwann cells
hypothalamus
temp, thirst, hunger, sleep
thalamus
sensory and motor signals
basal ganglia
voluntary motor movements cognition learning habits emotions eye movement
neural development
CNS forms day 18
organ and brain develop first
pre natal development
pro = tel and die fore
mes = mes mid
rhomb = met and mye hind
spinal cord
first trimester
2nd month neural tube
3rd month embryo reflexes
sex hormones release
second trimester
4th month sensory input
5th month some motor control
third trimester
cortical surface
insula hidden lateral sulcus
compassion and empathy
forebrain telencephalon
largest brain section voluntary movement with cognitive process
amygdala (forebrain)
memory and decision making
hippocampus (forebrain)
memory and decision making
forebrain diencephalon
thalamus
hypothalamus = posterior division of forebrain connecting with hemisphere and mes
diencephalon thalamus
inner room
sensory and motor relay
conciousness and sleep
intergreates cerebral corte xinformation
diencephalon hypothalamus
temperature, thirst, sex drive
hormone release
mesencephalon
auditory and visual reflex
mesencephalon tegmentum
reflex pathway
prevents unwanted movement
eye movement
metencephalon pons
respiration and swallowing
relays forebrain info to the cerebellum
myelencephalon
breathing and heart rate
broadmann area
1,2,3 primary somatosensory cortex
4 primary motor cortex
17 visual cotrex
41,42 auditory cortex