Ascending Tracts | Dorsal Column: Medial Lemniscus Pathway
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- เผยแพร่เมื่อ 1 มิ.ย. 2024
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Join us during our ascending tracts video series where we will be talking about the dorsal column: medial lemniscus pathway. We hope you enjoy this lecture and be sure to support us below!
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Dorsal cloumn medial leminisus-
Types of sensation-
Fine discriminative touch
2 point touch
Pressure touch of skin
Proprioception
.
Receptor-
Raffinis corpuscle/bulbus corpuscy- vibration and stretch of skin.
Pretracheal nerve endings- hair bend and touch.
Paccinian corpuscle- deep pressure.
Merkel disc- fine touch and superificial pressure.
Meissners corpuscle- discriminative touch.
Muscle spindle- 1A proprioception.
Golgi tendon- stretch of muscle tendon.
A alpha fibers- muscle tendon and Golgi tendon-.
A beta - rest .
Cervical part of spinal cord above T6.
LUMBAR PART Of spinal cord below T6.
1 St order neuron- drg.
2nd - nucleus fasciulus
Nucleus cuneatus.
3rd -internal capsule.
Drg
Fasciulus gracilis- lower limb
Fasciulus cuneatus- upper limb
Somatotopic arrangements-
Medial to lateral
Sacrum to cervix.
Ipsilateral SC.
Nucleus cuneatus
Nucleus gracilis
Cross to opposite side C/L internal arcuate fibers.
Medial leminisus
ThalamusVPL/VPI
Posterior limb of internal capsule.
Corona radiata
Primary somatosensory area
Secondary somatosensory area.
Sensory homunculus.
Lenticular artery branch of middle cerebral artery supply internal capsule. Loss of sensation.
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Such a great video! Im so glad Ive discovered your channel! I always remember it as GRacile = GRound (stomping legs on the ground) and cuniate = Cervical spine (upper limb), just in case someone needs help remembering it :)
F.gracilis .....'gracilis' is a lower limb muscle.....just another mnemonic😁
Other mnemonic is fasciculus Gracilis other name is Goll
With your musculus gracilis get a Goal :D (fas.gracilis get sensibility from your legs)
(Musculus Garcilis-M is midle at the spinal cord, the Fasciculus Gracilis is at the middle)
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