Anterolateral system

Question 1

بسم الله الرحمن الرحيم
“وهو الذي يرسل الرياح بشرا بين يدي رحمته “

Sensory pathways divided into ?

Answer 1

Anterolateral system spinothalamic trach For exteroception
Dorsal column system Lemiscal system
Dorsal column tracr i.e for perception

Question 2

Anterolatetal system is responsible for which sensation /

Answer 2

Ecterceptors sensation like
Pain Crude touch Pressure Temperature

Question 3

Lemiscal system is respnsible for which sensation ?

Answer 3

For propriception movment position high weigh on muscles
deep sensations and fine touch
deep snesations and fine touch

Question 4

Components of Anterolateral system mention

Answer 4

ventral spinothalamic tract
lateral spinthalmic tract
Spinotectal tract
Spinoreticular tract
for exteroception

Question 5

Posterior column Components mention

Answer 5

Fasiculus gracilis
Fasiculus Cunate
for proception

Question 6

Sensory pathway is formed of/

Answer 6

3 Neurons
-1st order neuron and it is the neuron of Dorsal root ganglion its process goes peripherally and the center goes to the spinal cord the preiphery receive stimuli from receptors and tranmit it by process to dorsal root to spinal cord
-2nd order neuron in the spinal cord and at which the first rely and it decussates and ascend in brainstem as leminscus then to thalamus

3rd order Neuron it VPLN Of thalamus
Ventral Postero lateral nucleus of thalamus passing through psoterio limb of internal capsule and corona radiata then reaches the cerebral cortex .

Question 7

lateral spinpothalmic treact for ?

Answer 7

Pain and temperature

Question 8

Anterior spinothalamic tract for ?

Answer 8

Crude Touch

Question 9

describe pain and temperaute pathway

Answer 9

it is through lateral spinothalamic tract
_________________________
the first order neurot receives pain stimuli from its perphery and trasmits it to the dorsal root ganglia to central process to second order neuron in spinal cords which may be in area
1 or 4-8 in fast paini
2 SGR in slow pain
1- fast pain 2n order nueron deucssate to be contralateral and asend in the neo spinothalamic tract ascending as leminsucs in brainstem the rely on thalalmus 3rd order neuron
2- slow pain 2n order neuro decussate to be contralateral and ascend in spinoretiuclar tract or paleo spinothalamic tract making collaterals with reticular formation and then ascends to intralaminar nucluse of thalamus
3rd oreder nueron of VPLN of Thalamus corss the posterir limb of internal capsule and the corona radiata to sensory cortex in both pathes

Question 10

where does first order neuron of pain pathway rely

Answer 10

the first order neurot receives pain stimuli from its perphery and trasmits it to the dorsal root ganglia to central process to second order neuron in spinal cords which may be in area
1 or 4-8 in fast paini
2 SGR in slow pain

Question 11

describe 2nd order neuron of Pain and temp pathways

Answer 11

1- fast pain 2n order nueron deucssate to be contralateral and asend in the neo spinothalamic tract ascending as leminsucs in brainstem the rely on thalalmus 3rd order neuron

2- slow pain 2n order neuro decussate to be contralateral and ascend in spinoretiuclar tract or paleo spinothalamic tract making collaterals with reticular formation and then ascends to intralaminar nucluse of thalamus

Question 12

describe 3rd order neuron pathway of pain and temp whether slow or fast pain

Answer 12

3rd oreder nueron of VPLN of Thalamus corss the posterir limb of internal capsule and the corona radiata to sensory cortex in both pathes

Question 13

affective compnent of Pain and temp pathway

Answer 13

Emotions generated by ascending of intralaminar nuscles of thalamus axons to Cingulate Gyrus

Question 14

Lateral spinothalamic tract dsecribe

Answer 14

Funfunciton : it is 2nd order neuron of pain and temperature pathawy in spinal cord in lamia 1 or 4-8 for fast or SGR FOR SLOW of the opposite side of body to the thalamus
____________________________
begins from lamiana 1 or 4-8 of spinal cord and decussate at ventral white commisure for fast
SGR for Slow
_________________________
Position in spinal cord Ascends in lateral white column
_____________________
Laminations : cervical medially
sacral laterally
_____________________
termination : asendins in brainstem as spinal leminsucs and ends in the VPLN of Thalamus
____________________

Question 15

Lateral spinothalamic tract dsecribe

Answer 15

Laminations : cervical medially
sacral laterally

Question 16

Describe pathway of Crude touch and pressure

Answer 16

first order nueron take the pressure from receptors from its periphery to the Dorsal root ganglion to its central process to lamia 4-7 Nucleus proprius in spinal cord
Second order neuron take the impulse from 1st one in Nucleus proprius and decussates by crossing the Ventral White Commisure then asends Ventral spinothalamic tract where the cervical medial and sacral lateral then ascends brain stem joining the medial Leminiscus of propceiption to the intrathalamic nuclei in vpln
3rd order neuron : from VPLN in thalamus Cross the Posterior limb of Internal capsule and The corona radiata reaching the sensory cortex

Question 17

first order nueron of crude touch and pressure describe

Answer 17

first order nueron take the pressure from receptors from its periphery to the Dorsal root ganglion to its central process to lamia 4-7 Nucleus proprius in spinal cord

Question 18

second order nueron of crude touch and pressure describe

Answer 18

Second order neuron take the impulse from 1st one in Nucleus proprius and decussates by crossing the Ventral White Commisure then asends Ventral spinothalamic tract where the cervical medial and sacral lateral then ascends brain stem joining the medial Leminiscus of propceiption to the intrathalamic nuclei in vpln

Question 19

In brainstem , the ventral spinpthalamic tract joins ?

Answer 19

Medial Leminscus of dorsal column tract which is responsible for Proprioception

Question 20

Describe Ventral spinothalamic tract

Answer 20

Function: 2nd order neuron of Pressure and crude touch of oppsite side of body to the thalamus
Begins at Nucelus propris of lamina 4-7
position : ascending in anterior white column of spinal cord
Lamination cervial medaill Sacral lateral
Termination : asends spinal cord and brainstem joining the Medial leminscus to reach the thalamus VPLM

Question 21

Describe spinoreticular tract

Answer 21

It ascends in the ventral and lateral white columns of spinal cord and intermingled with PALEO lateral spinothalamic tract ( slow pain )
ending at pontomedullary reticular formation
asends to the thalamus nonspecfic nuclei and then to cerbral cortex for awakeness or to cingulate gyrus for emotion ,,,,,
Spinoretculo cortico thalmic pathway is a war for slow dull aching pain and Affective component of pain in cingulat gyrus emotions

Question 22

intermingled with lateral PALEO spinothalamic tract ( slow pain ) ?

Answer 22

spinoreticular tract

Question 23

asends to the thalamus nonspecfic nuclei and then to cerbral cortex for awakeness or to cingulate gyrus for emotion ,,,,,

Answer 23

spinoreticular tract

Question 24

spinoreticular tract ending

Answer 24

ending at pontomedullary reticular formation

Question 25

Spinoretculo cortico thalmic pathway is a war for slow dull aching pain and Affective component of pain in cingulat gyrus emotions GR

Answer 25

It ascends in the ventral and lateral white columns of spinal cord and intermingled with lateral PALO spinothalamic tract ( slow pain )
ending at pontomedullary reticular formation
asends to the thalamus nonspecfic nuclei and then to cerbral cortex for awakeness or to cingulate gyrus for emotion ,,,,,

Question 26

describe spino tectcal tract

Answer 26

Most fibers decussate to other side of body and asends in lateral whie column of spinal cord ending at Superior Colliculi of Mid brain
Responsible for Visual Reflexes to see the soruce of pain by turning head ,

Question 27

spino tectcal tract asends in?

Answer 27

asends in lateral whiete column

Question 28

spino tectcal tract ends

Answer 28

Superior Colliculi of Mid brain

Question 29

Superior Colliculi of Mid brain is responsible for ?

Answer 29

Visual reflexes turning head towards the source of pain

Question 30

Describe pathway of pain and temperature from face

Answer 30

Carried By CN5 Trigeminal
First Neuron is the Trigemnial ganglion nerons which as DRG has pseduounipolar Neurons and get impulses of sensation from face branches and it central processes join to form trigeminal root and reach the Spinal Nucleus Of Trigeminal …
second Neuron from The spinal Nucelus Of Trigeminal reache opposite site of body and ascends in TrigminoThalmic tract to VPMN of thalamus then the 3rd neuron ascends to cross Posterior limb of internal capsule and Corona Radiata to reach somatosensory postcentral gyrus upside down remeber

Question 31

Describe pathway of pain and temperature from face by

Answer 31

Carried By CN5 Trigeminal

Question 32

central processes of trigeminal what does it do ?>

Answer 32

central processes join to form trigeminal root and reach the Spinal Nucleus Of Trigeminal …

Question 33

Spinal Nucleus Of Trigeminal … give ,,, neuron that?

Answer 33

2nd order neron that ascends in
TrigminoThalmic tract to VPMN of thalamus then the 3rd neuron ascends to cross Posterior limb of internal capsule and Corona Radiata to reach somatosensory postcentral gyrus upside down remeber

Question 34

Describe Lissaure’s tract

Answer 34

it is dorsolateral tract
the central process of dorsasl root ganglion enter spinal cord from dorsal root giving ascending and descending branches
these fibers move at the apex of dorsal horn

Question 35

Neosinothalamic tract Carries ?

Answer 35

Fast Discriminative comonent of pain

Question 36

Paleo spinotalamic tract carries ?

Answer 36

affective motivaitonal compnent of pain SLOW PAIN

Question 37

Not all spinothalamic tracts end on VPLN ?

Answer 37

Some in
Intralaminar Nuclei
Midline Nuclei
Involved in Arousal Behavior

Question 38

Crude touch come from ?

Answer 38

Contralateral ventral spinothalamic tract

less ipislateral Dorsal column tract
عشان كده صعب انك تفقد الاحساس ده مع الاصابات
للحبل الشوكي

Question 39

الحمدلله رب العالمين

Answer 39

وأما ما ينفع الناس فيمكث في الأرض
!!!