Ex1 / Ch7 Somatosensory Pathways Flashcards by The Deen

Spinothalamic pathway carries

(what kinde of sensory information)

crude touch

pain

Temprature

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Dorsal Columns carry

(what kinde of sensory information)

light touch

vibration

conscious proprioception

discriminating touch

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Posterior (Dorsal) Columns fiber size

large in diameter, and longest

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Posterior (Dorsal) Columns travels to

gracilus, cuneates nucleus

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Posterior (Dorsal) Columns is joind by

trigeminal lemniscus

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Posterior (Dorsal) Columns projcet info to

thalamus
posterior internal capsul
somatosensory cortex

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Anterolateral Pathway contains

(which pathways)

Spinothalamic

Spinoreticular

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Spinoreticular ends in

reticular formation

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Anterolateral Pathway fibers size

small

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Anterolateral Pathway Synapse

immediate synapses

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Anterolateral Pathway decussation

it decussates but it may take a few segments

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Lateral spinal cord lesion effects

(what sensation)

contralateral pain and temperature sensation

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Lateral spinal cord lesion effects

(what level)

beginning a few levels below the lesion

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Spinothalamic carries

Discriminating pain and temp

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Spinothalamic major relay

ventral posterior lateral (VPL) nucleus

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Spinothalamic terminates in

thalamus

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Spinoreticular carries

emotional and arousal aspects of pain

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Spinoreticular terminates in

medullary–pontine reticular formation

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Spinoreticular Projects into

intralaminar thalamus

for more broad distribution to whole cortex

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All thalamic (Trigeminal) ascend to

parietal lobe

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which cortex is responsible to tell you “when I got touched”

Primary sensory cortex

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hich cortex is responsible to describe “how I got touched”

Secondary somatosensory cortex

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sensory loss can happen in

(which part of the sensory pathway)

anywhere in the sensory pathway

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Define the term: Bar

pressure

Define the term: graph

writing

Define the term: top

mapping

Define the term: stereo

Define the term: Dys

something isn't right

Define the term: allo

everywhere

Define the term: pall

vibration

Define the term: par

abnormal

Define the term: an/a

without

Define the term: algia

pain

Define the term: dynia

pain

Define the term: algesia

pain

Define the term: esthesia

feeling

Define the term: gonsis

knowledge

Define the term: pathia

something isn't wright

Define the term: parasthesia

tingling

Define the term: arthralgia

joint pain

Define the term: myalgia

muscle pain

Spinal Cord Lesions Usually correspond to

motor/ sensory deficit

the best way to identify Spinal Cord Lesions is by using

MRI

what level we look for at patients with Lumbar cord compression

Cauda equina

Describe Spinal cord shock

Temporary traumatic whiplash extremity tingling

Spinal cord shock duration

24-48 hours

Term refers to the inflammation of spinal cord

myelitis

Spinal cord inflamation MRI Findings

water density in the spinal cord, changes to the myelin

Def: Myelomalacia

spinal cord softening

Myelomalacia caused due to

hemorrhage into cord or ischemia

Myelomalacia caused in eldarly by

osteophytes stenosis

Myelomalacia caused in athletes by

disc lesion

describe the damage of Transverse cord lesion

all function lost below level of lesion

Transverse cord lesion causes

penetrating trauma multiple sclerosis myelitis

Hemisection the Brown Sequard Syndrome distributions

loss of contralateral pain ipsilateral upper motor neuron lesion signs

Hemisection the Brown Sequard Syndrome causes

penetrating trauma lateral compressive tumors multiple sclerosis

Central cord syndrome size and location

small lesions in central commissure

Central cord syndrome Distribution

suspended sensory loss (bilateral) of pain and temperature Cervical gives classic cape Distribution Larger lesions may affect anterior horn cells

Central cord syndrome causes

syringomyelia contusions spinal cord tumor

Posterior cord syndrome distributions

blue man group (whole body except head)

Posterior cord syndrome causes

trauma posterior tumor multiple sclerosis b12 defic 3\* syphilis (tabetic or steppage gait)

Anterior cord syndrome Distribution

anterior 2/3 of SC, loses motor function, and pain sensation below the lvl of the lesion

Anterior cord syndrome cuases

trauma MS anterior spinal artery compression

in Bladder Function Sense of fullness reaches

sensory cortex

Bladder Function Descending pathway is

medial frontal micturition center

Bladder Function Descending pathway activates

voluntary voiding

Detrusor reflex is contraction of

the top of the bladder

In Positive feedback results: the more the flow, the more \_\_\_\_\_\_\_\_\_\_\_\_\_\_

relaxation of sphincters

what happens when flow stops (empty or voluntary)

urethral sphincters contract

Urethral reflex is when

urethra contracts- detrusor relaxes

Bladder Lesion Sites

**Brain**- voluntary conscious control **Spinal cord**- upper motor neuron **Sacral nerves**- lower motor neurons

Bladder Malfunction happens due to

Lesion of bilateral medial frontal micturition center

Bladder Malfunction Results in

pontine and spinal micturition centers activation when bladder is full

with Bladder Malfunction, Urine flow and emptying are

normal But not voluntary

what diseases can lead to bladder malfunciton

hydrocephalus parasagittal meningioma neurodegenerative disorder Lesion between pons and conus medullaris (spinal cord)

Bladder Malfunction makes the bladder become

hyperreflexic or spactic

Detrusor/sphincter dyssynergia symptoms

urgency, detrusor spasm, incomplete emptying

Detrusor/sphincter dyssynergia causes

trauma tumor transvers myelitis multiple sclerosis (any spinal cord lesion)

Lesions of S2-4 nerves Symptoms

areflexive atonic bladder

Lesions of S2-4 nerves Caused by

diabetic neuropathy vertebral body/disc degeneration trauma

Lesions of S2-4 nerves results in

lack of sensory input from filling bladder pt has overflow and stress incontinence

Bowel Incontinence can happen due to

medial frontal lesion as with the bladder spinal cord lesion conus or peripheral lesion

Ex1 / Ch7 Somatosensory Pathways Flashcards

(83 cards)