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A-CNS physio > Other Reflexes > Flashcards

Other Reflexes Flashcards

1
Q

بسم الله الرحمن الرحيم وبه نستعين
Mention other reflexes than SR

A

Flexor withdrawal reflex
Corssed Reflex
Superficial Reflexes

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2
Q

Flexor withdrawal reflex
Give definition

A

PRECA RSD protective Reflex Flexion and Withdrawal a limb from painful stimulus

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3
Q

Stimulus of flexor withdrawal reflex?
Receptors?

A

Painful stimutls
Ploymodal pain receptors قرصة - لسعة

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4
Q

Afferetns and centers of Flexor withdrawal reflex ?

A

A delta + C fibers
__________
Spinal cord polysynaptic 4 synapses

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5
Q

Efferetn and effector of flexor withdrawal reflex
and respone?

A

Efferent alpha motor neuron
effector Extrafusal muscle fiber
Flexion and withdrawal of a limb from painful stimulus

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6
Q

properties of Flexor withdrawal reflex…

A

ARDI PSRA
After discharge
Reciprocal innervation
Divergence
irridiation

Painful stimuli
Polysynaptic
SYNAPTIC FATIGUE
Reverbrating circutis
AFFERENT A DELTA + CFIBERS

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7
Q

Receprioal innervation on flexoe withdrawal reflex ?

A

Contraction of flexor and inhibtion of extensor at the same time

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8
Q

Divergence and FLEXOR Withdrawal reflex

A

The stronger the stmiulus the more afferents from receptor activiating more interneurons in the SAME spinal segments so activating more alpha motor neuron the stronger response becones

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9
Q

Irrdiatioin is different from divergence explain

A

The stronger the stimulus the more receptors giving afferents to interneurons in DIFFERENT spinals SegmentS and the alpha motor their alpha motor neurons activating more than one muscle in stronger response

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10
Q

After discharge appear in flexor withdrawal reflex

A

as flexed muscles remains flexed for some time after removing the stimulus due to it reverbrating ciruits\

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11
Q

لا تكثروا الحديث بدون ذكر الله
_____________________
Crossed extensor reflex mean ?

A

Reflex extensor of a limb due to the other limb being exposed to strong painful noxious stimuli

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12
Q

Stimulus of crossed extensor reflex?
aim?

A

Strong painful stimuli to other limb
to support body

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13
Q

Respone of Strong painful stimuli to alimb ?aim?

A

Ipislateral Flexion
Contralateral extension

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14
Q

Propertirs of crossed Extensor Reflex?

A

Long latent Period
Long After Discharge
Reciprocal innervation

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15
Q

Recprocal innervation in crossed extensor reflex ?

A

Contraction of extensors
inhibition of Flexors

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16
Q

What is supposed to have the greates role in crossed extensor Reflex > ?

A

Intersegmental InterNuERON
Trasnmitting impulses between 2 sides of spinal cord

17
Q

Superficial Reflexes

A

The reflexes due to scratching skin activatiating superficial receptors under the skin
Types: Abdominal+Plantar
Stimulus : Scratch the skin
Receptro: superficial receptor
Afferents : Sensory neuron from receptro to drosal horn of spinal cord
Centers L: spinal cord semgenrs ?
Efferents: Alpha motor neuron
Effector Extrafusal Muscle fibers

18
Q

upper motor neuron is essential for ,,,,, reflex?

A

abdominal reflex
____________
Increasing excitation of the lower motor neuron which will not activated without UMN otherthan other reflexes

19
Q

UMN is importatnt for modifciaiton of ….reflex?

A

Planatar

20
Q

UMNL CASUE?

A

Loss of abdominal reflexex
reflexes below the level of lesion
The plantar reflex occurs but unModified as +Babinski sign i.e dorsiflexion

21
Q

Explain Abominal reflex

A

Superfiical reflex
Stimulus: scratch of skin aroun umbilicus
receptor : superficial receptors
Centers : spinal segments
t6-9 for upper umbilicus
t10-t12 below umbilicus
response: attract umbilicus to site of contration
Contract of umbilical muscle + shift of umbilicus

22
Q

Clincal importanc of abdominal reflex?

A

In case of UMNL there is no Abdominal reflex

23
Q

Explain Plantar reflex

A

Superifical Reflex
Stimulus skin scratch from below upwards laterally
Receptors : superficial receptors
Centers: spinal segments S1-S2
Lost in LMNL
Response Plantar flexion of toes
it loss casuing+ babinski sign dorsiflexion of big toe + fanning of other 4 toes

24
Q

When +BABINSKI OCCUREs ?

A

Pathological :
Deep Coma
UMNL
Partial babinski
area 4 – dorsiflexion of big toe
area 6 - fannning of lateral 4 toes
________________
Physiological:
deep sleep
general anasthesia
Infants < 1 year

A-CNS physio (29 decks)

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