Done By: manar aljebreen Abdulrahman alsharidah
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1 Female Side Male side Done By: manar aljebreen Abdulrahman alsharidah Revised By: Nour Al-Khawajah Mohammed Asiri 2
2 Slide No.( 1 ) Slide No.( 2 ) 3
3 Slide No.( 3 ) Slide No.( 4 ) Upper motor neurons are motor neurons that originate in the motor region of the cerebral cortex or the brain stem and carry motor information down to the final common pathway ( lower motor neuron ). 4
4 Slide No.( 5 ) Slide No.( 6 ) 5
5 Slide No.( 7 ) Slide No.( 8 ) UMN LMN MUSCLE 6
6 Slide No.( 9 ) Slide No.( 10 ) 7
7 Slide No.( 11 ) Team Notes : Clonus: is a series of involuntary, rhythmic, muscular contractions and relaxations. Babi nski s sign: S1 and 2 = sacral segments 8
8 Slide No.( 12 ) Wasting of any muscle is due to the loss of innervation and the use. In the UML very slight wasting of the muscles because they are supplied by the reflex arc. 9
9 Slide No.( 13 ) Slide No.( 14 ) 01
10 Slide No.( 15 ) Team Notes : The lesions are summarized in a table in the next page. 00
11 Upper motor lesions Lower motor lesions Extent of Wide Localized Paralysis Site of the Contralateral Epsilateral Paralysis Tone of the Hypertonic muscles Hypotonic muscles Muscles Reflexes *Superficial reflexes are All the reflexes are absent lost *Deep reflexes are present (Hypereflexia) : 1-clonus 2-babinski sign Wasting of Slight wasting Marked wasting the muscles (reflex arc is present) Lack of voluntary movement. Response Normal response and Abnormal response to electrical excitability and excitability stimulation 2
12 Slide No.( 16 ) Monoplegia: paralysis of a single limb such as Lesion in Corona Radiate. Hemiplegia : total paralysis of the arm, leg, and trunk on the same side of the body Quadriplegia: paralysis of both arms and legs. (Lesion of all limbs ) Paraplegia: paralysis of lower half of the body with involvement of both legs. (Lesion in both lower limbs) 3
13 Slide No.( 17 ) Slide No.( 18 ) Lesion in the Brain Stem: Contralateral Hemiplesia Ipsilateral paralysis of the cranial nerves 4
14 Slide No.( 19 ) Slide No.( 20 ) 5
15 Slide No.( 21 ) *The anterior horn cells are affected with the pyramidal fibers so there is ipsilateral paralysis (LMNL) at the level of the lesion. 6
16 Slide No.( 22 ) Slide No.( 23 ) 07
17 Slide No.( 24 ) Team Notes : 08
18 Slide No.( 25 ) 09
19 Slide No.( 26 ) Team Notes : 21
20 Slide No.( 27 ) Team Notes : Acute stage: *Although it is an upper motor lesion there is flaccid paralysis of the muscles => because of the complete loss of the pyramidal and the extrapyramidal fibers 20
21 Slide No.( 28 ) Team Notes : Acute stage LMNL Extent of paralysis Much more Less Hemianaethesia Present Absent Barbinsk s sign May be +ve -ve Muscle atrophy Absence Marked wasting 22
22 Slide No.( 29 ) Team Notes : In the chronic there will be spasticity of the muscles. Clasp knife spasticity: a type of increased muscle tone due to a pyramidal tract lesion, in which abnormally increased resistance to passive stretch of a muscle abruptly decreases. Clasp-Knife (Pyramidal): Means when you want to flex the arm there will be resistance in the beginning and then it will flex loosely - Rigidity (Extrapyramidal): When extensors and Flexors contract at the same time e.g. Lead-Pipe Rigidity 23
23 Slide No.( 30 ) Slide No.( 31 ) 24
24 Slide No.( 32 ) Team Notes : All ascending sensory tracts and descending motor tract will be damaged below the transaction. *upper cervical = fetal *lower level= 1-spinal shock. 2-recovery of reflex activity. 3-failure and death if untreated. 25
25 Slide No.( 33 ) 26
26 Slide No.( 34 ) Due to loss of pyramidal fibers below Team Notes : Quadriplegia: lower cervical region Paraplegia:Midthoracic region and lower. 27
27 Slide No.( 35 ) ABP=arterial blood pressure Slide No.( 36 ) 28
28 Slide No.( 37 ) Humans from weeks to months Slide No.( 38 ) 29
29 Slide No.( 39 ) Slide No.( 40 ) No recovery for motor and sensation Babinski s sign means the recovery stage has started 31
30 Slide No.(41 ) 30
31 Slide No.(42 ) Team Notes : Maturation is back but without being controlled by higher centers as in children. Shock stage=no contraction of the bladder Recovery stage= contraction but without higher control. 32
32 Slide No.(43 ) Team Notes : When the skin is touched by a painful stimulus this will produce a mass reflex : an abnormal condition, seen in patients with transection of the spinal cord, characterized by a widespread nerve discharge. Stimulation below the level of the lesion results in flexor muscle spasms, micturation, pallor, swinging blood pressure, and sweating. 33
33 Slide No.( 44 ) Team Notes : 34
34 Slide No.( 45 ) Slide No.( 46 ) 35
35 Slide No.( 47 ) Slide No.( 48 ) 36
36 Slide No.( 49 ) AHC are affected Slide No.( 49 ) Epsilateral 37
37 Question : Which one of the flowing is considered a cause of spasticity? 1. lower motor neuron lesions 2. stroke 3. cerebellar lesion 4. hypertension Which of the following is correct regarding limb spasticity in hemisection of the spinal cord? 1. no limb spasticity 2. occurs on both sides at the level of the lesion 3. occurs contralaterally ( on the opposite side ) below the level of the lesion 4. occurs on the same side of the body below the level of the lesion A lesion in the midthoracic region leads to : 1.monophlegia 2. quadriphlegia 3.paraphlegia 4.hemiphlegia Answers :
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