GREY AND WHITE Flashcards
بسم الله الرحمن الرحيم وبه نستعين
FIBERS BELONG TO WHICH MATTER?
Unmyleinated grey
Myleinated White
white and grey matter have in common ?
Neuroglia + blood capillaries
ganglion containds and surroudnded
by
DRG
Neurons +fibers +neuroglia
fuisform and surrounded by vascular fibrous capusle in intervertebral foramen
رب اجعل لي في وقتي بركة
رب اجعل لي في وقتي بركة
رب اجعل لي في وقتي بركة
grey matter formed of ?
Nerve cells which are “?
Fibers unmyelinated
Neuroglia
blood capillaries
Multipolar
grey matter neucli appear in all spinal segments
-PosteroMarginal
-Substantia gelatinosa it evident in cervical + lumbar
-Main Sensory Nucleus
Nuclei for pain temp and crude touch
1,2,3 Of Main sensory Nucleus
Clarkes nucleus found betweem ?
c8-L3
Preganglionic sympathtaic in lateral horn in which nuclei ?
in intermediolateral nucleus from t1-l2
Preganglioninc parasmypathatic fibers appear in /
sacral segments 234
lateral surface of anterior horn
nuecli of ventral horn of spinal cord contains ?
Smatic efferent neurons :
alpha motor neuron
y motor neurons
medial neuclar group of ventral horn includes ?
1-ventromedial
2-posteromedial
for neck and back
mucels
lateral nuclear group of ventral horn contains ?
anterior
anterolateral
posterolateral
retro posterolateral
central nuclei\
the five appears in cervical and lumbar but in thoracic compensated as one lateral Nuclus
Most medial muscles suppleied by ?
most distal mucels supplied by ?
1- medial = most medial nuclei
2- distal = most lateral nuclei
_____________
hand is upplied by ?
foot is supplied by ?
retroposrtolateral of cervical
retroposterolateral of lumbar
flexors supplied by?
Externsors supplied by ?
flexor=posterior nuclei
externsor =anterior nuclei
how to get cytoarchitetcural lamination of grey matter
thick segmetns of spinal cord stained with Cresyl violet
Rexed
Lamina 12345789
1 posteromarginal nucleus
2 substantia gelationsa
34 main sensory nucleus
56 retuclar nucleus
7 clarkes interomeidomediallateral
8 termination of extrapyramidal tract
9 medal lateral anterior horn
White matter is divied into :
Dorsal white column
lateral white column
ventral while column
white matter -
Tracts + neuorglia + blood capillaries
What is tract ?
nerve fibers collected have same origin path termination function
Loong tracts dived into ?
Ascending :
Propriceptive
Exteroceptive
Descneding:
PPyramidal
ExtraPyramidal
Proprioceptive pathaways
cortical :
graciel+cunate
___________
cerebellar
Dorsal and ventral spinocerebellar
Cuneocerebellar
SpinoOlivary
GRACILE TAKE IMPULSES FROM ?
SACRAL LUMBAR LOWER THORACIC
CUNATE
UPPER 6 THORACIC +CERVICAL
dIRECT UNCORSSED ?
dorasl spinocerebellar tract
dorasl spinocerebellar tract function
Coordination of posture and movment of individual limb muscle
Compare between dorsal and ventral spinocerebellar tract in Origin ?
dorsal clarkes
ventral : lamia 5-6-7 lumbar and sacral region
Compare between dorsal and ventral spinocerebellar tract in Termination
Dorsal ICP
ventral scp
Compare between dorsal and ventral spinocerebellar tract in Crossing
Dorsal uncrossed
Ventral crossed x2
Compare between dorsal and ventral spinocerebellar tract in FUNCCTION
DORSAL Give information about indivdual limb muscle
Ventral give information about whole limb
External arcuate fibers formed by?
Sensory dexussation of cunate and gracile nucli fibers
Function of cunocerebellr tract ?
Equivalent of dorsal spincerebellat tract but in upper limb only as it is above c8
Indirect spinocerebellar tract is
SpinoOlivary pathwaaaaaaaaay
Spino olivary pathway relay on ?
lamina 4 5 medial 7,8
then cross then asends between vental and lateral white columns to terminate in inferior olivary nucleus then sends
Olivo Cerebellar tractMOVING through ICP
Function of spinoloivary tract
indeirect spinocerebellum
Motor learning
Subconsouos propriceptive impulses to cerebellum whenever a new movment in learned
pROPRIOCEPTIVE SNESATIONS CARRIED TO CEREBELLUM THROUG ?
1-From C8-L3 dorsal spinocerebellar tract
2-above c8 cuneocerebellat tract
3-below l3 enters DRG then with gracile tract in posterior column then until clarke nuclei leaving gracile ascending in dorsal spinocerebellar tract
Exteroceptive pathways?
Lateral spinothalamic pain temp
ventral spinothalamic crufe touch
spino tecetal
spinoreticular
latral spino thalamic carries?
Fast pain
Temp narrow range
ventral spinothalamic carries?
Crude touch
Lateral and ventral spinothalamic ascends in ?
spinal lemincsuc
and works contralaterally
Spinotecetal tract termination and function
superior colliculus of midbrain Center of vision
Reflex movments of the neck towards visual stimuli
SpinoReticular tract terminates in ?
Reticular formation in brain stem
فكر ثلاثا !
function is ?
transmitting slow dull aching pain with dorsal column tract medial lemiscus
pyramidal tract imp in ?
gross movments
aids in fine movemrrnts
“Voluntary”
Extrapyramidal tracts
Rubro
tecto
vestibulo
reticulo
medial longitudkinal buindle
Explain rubrospinal tracct
from red nucleus of midbrain then through tementum of midbtain corssing ventral tegmental decussation descends in lateral while colu,mns till AHCs
function :
Facilitatroy impulses to muscle ton of flexor group from cortex + cerebellum
explian tectospinal tract
From superio colliculus of midbrain crossing tegmentum as dorsaaaaaaal tegmental decussation till the AHCs of Cervcial Segments
function :
Reflex Postural adjustments due to Visual and Audiotry stimuli
Vestibulospinal tract functon ?
Strong Excitatory impulses for antigravity muscles
Strong Excitatory impulses for antigravity muscles
Strong Exicatoty imuluses for antigravity muscles
Diteres nucleus is for ?>
Lateral Vestiibulospinal tract
Medial Vestibulsospinal tract coniotues till ?
MId thoraci level
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functions of Retiuclospinal tract ?
The reticular formation can influence muscle tone by acting on gamma neuros supplying the Contractile parts part of muscle spindle
Medial longitukdinall bundle formed of ?
Pontine Reticular fiber
Vestibulospinal
Tectospinal
Intersitiospinal
Short tracts
Leissaurs tract pain modulation
comma shpaed tract stretch reflex arc cunate
septomarginal tract stretch refglex arc gracile
Faasiculus proprius interconnect nerons in different spinal segments
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