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A-CNS physio > مقدمة الجهاز العصبي الحركي > Flashcards

مقدمة الجهاز العصبي الحركي Flashcards

1
Q

بسم الله الرحمن الرحيم وبه نستعين
“سنريهم آياتنا في الآفاق وفي أنفسهم حتي يتبين لهم أنه الحق “
Define Motor Nervous System

A

System responsible for
Intiation + Coordination +Control of Skeletal Muscle Contraction

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1
Q

بسم الله الرحمن الرحيم وبه نستعين
“سنريهم آياتنا في الآفاق وفي أنفسهم حتي يتبين لهم أنه الحق “
Define Motor Nervous System

A

System responsible for
Intiation + Coordination +Control of Skeletal Muscle Contraction

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2
Q

Motor of Facial Muscles is controlled by?

A

Nuclei of Motor Cranial Nerves

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3
Q

Motor of body muscles is controlled by ?

A

AHCs of Spinal Cord

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4
Q

If UMN is cut leads to ?

A

Voluntary contarction loss
Reflex is intact but is not as usual

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5
Q

IF LMN IS CUT ?

A

Loss of Both voluntary and Reflex Movments

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6
Q

Type of skeletal muscle contration ?

A

Voluntary purpoful
Reflex automatic

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7
Q

Mention example of voluntary mocments

A

Fine Movements :
Fingers + hands called
distal limb muscles
Gross Movements :
Axial muscles: back
Proximal limb muscles: Arm

Learned Skilled Movments = Fine+Gross movements as piano playing

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8
Q

Requirements of Voluntary muscle contraction mention

A

Intact Mucles
Intact UMN
Intact LMN

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9
Q

Reflex Muscles contraction requiremts?

A

Intact muscle
intact Reflex Pathway
Intact LMN

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10
Q

Reflex contracion as ?

A

Muscle ToOone

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11
Q

Antreior horn cells has 2 types of neuron mention

A

Anterior motor neuron to SM
Interneurons Intermediate

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11
Q

Antreior horn cells has 2 types of neuron mention

A

Anterior motor neuron to SM
Interneurons Intermediate

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12
Q

types of anterior motor neurons

A

alpha +gama

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13
Q

alpha motor neuron called ?

A

Lower motor neuron
Final common path
to odrinary contractile extrafusal muscle fibers

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14
Q

Why alpha motor neuron called final common path ?

A

that is because whether the muscles contracted Voulnatry or Reflexly it needs in the end to send impusle to lower motor neuroooon

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15
Q

somatotopic organiztation of a motor neurons

A

يعني خريطة توزيع الالفات

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15
Q

medial part of Anterior horn supply ?

A

-Axial +Proximal limb muscles
-Gross Movements + Posture

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16
Q

Dorsolateral part of Anterior horn supply?

A

Distal limb muscle
For fine movments

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17
Q

Dorsal part of anterior horn for ?

A

Flexors

18
Q

ventral part on anterior horn for ?

A

Extensors

19
Q

In plexus area in spinal cord
Cervical + Lumbosacral enlargments there is ?

A

Numerous alpha motro neurons

20
Q

Below………………… alpha motor neurons control axial Muscles only

A

Below T1

21
Q

Functional unit used by motor system to perform movments? give defintion ?

A

Motor Unit
It is the alpha motor neuron+ its axons + Muscle fibers supplied

22
Q

Mortor unit for muscles of fine movments supply

A

3-6 fibers
Low Inervation ration

23
Q

Motor unit for muscles of gross movments suupply

A

200-300 fibers
High innervation ration

24
Q

Defina Motor Neuron Pool

A

كل اعصاب الفا الي بتغذي عضلة واحدة عصبيا
all aplha motor neurons innervating Single muscle

25
Q

Motor neuron pool depends on one segment of spinal cord? ????

A

No!
May extedns in several segments in spinal cord as
Quadriceps from
L2+L4 segments

26
Q

List the Factors affecting Discharge or rate of alpha motor Neurons .

A

1-Projections from higher centers
2-Interneurons
3-Endings of Sensory neurons in dorsal horn

27
Q

any contraction of muscle occures through activation of ?

A

alpha motor neurons

28
Q

Function of Gamma motor neurons

A

-Specialized for Contractile Intrafusal Fibers in Muscles spindle
-They are smaller and fewer
Axons called AY 4micro diameter

29
Q

mention types of gamma neurons

A

Large dynamic efferent y neuron
Small static efferent y neuron

30
Q

Compare between a and y neruons in percentage

A

a 65
y 35

31
Q

Compare between a and y neruons in size

A

a larger

32
Q

Compare between a and y neruons in size

A

a larger neurons
y smaller

33
Q

Compare between a and y neruons in fucntions

A

a: Ordinary contractile extrafusal muscle fibers
y: specialized contractile intrafusal muscle fibers in msucle spindle

34
Q

Compare between a and y neruons in size in anterior horn

A

A: Take the larger size
y ; take smaller size

35
Q

Compare between a and y neruons in types

A

alpha: one type
Y 2 :
Large dynamic+ Small Static

36
Q

اكتب نبذة عن خصائض الاعصاب الوسطية

A

منتشرة في كل مناطق المادة الرمادية للحبل الشوكي وحجمها صغير عشان كده الاستثارة بتاعتها بتكون سهلة لدرجة انها ممكن تطلق نبض بدون تحفيز اصلا
عددها 30 مرة اكتر من الاعصاب الحركية كلها علي بعضها الفا وجاما
زي اعصاب رينشو الوسطية التثبيطية

37
Q

Mechanism of actin of Inhibitory renshaw Neurons .

A

Activated by ach from Activated a motor neuron
then Cause?
1-Reuccrent inhibition or Negative Feed back Inhibition to the a motor neurons that activated it by glycine
2-Lateral Inhibition to naerby unactivated a motor neurons by glycine

38
Q

site of Renshaw ?

A

Ventral Horn of Spinal cord

39
Q

What is the function of Renshaw ?

A

Lateral inhibition : Sharpening of Actions of muscles
Recurrent Inhibtion: Prevents Overexcitation of Muscles and limit discharge of Alpha motor neuron

40
Q

معني رد الفعل ؟

A

ربط بين الجهاز العصبي الحسي والحركي

41
Q

مكونات رد الفعل ؟
reflex arc components

A

Receptor
Afferent
Center
efferent
effector

42
Q

Mention Charctertistics of Reflex ?

A

anis : -Automatic
-NonConscious
-Inborn
-Standarized

42
Q

Mention Charctertistics of Reflex ?

A

-Automatic
-NonConscious
-Inborn
-Standarized

43
Q

الحمدلله علي نعمه لاتعد ولا تحصي
اعوذ بك ربي من كفران النعم

A
44
Q

types of relfelxed according to center

A

Cortical
HypoThalamic
Midbrain
Medullary
Spinal
KHM2S
كلمني كلام كهمس~ لم افهم منه شئ

45
Q

type of reflexex according to synapse

A

Mono
Bi
poly synaptic

A-CNS physio (29 decks)

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