Differences UMN lesion vs LMN lesion

1. DIFFERENCES
D R N I L E S H N K A T E , P R O F E S S O R , P H Y S I O L O G Y , / D I F F E R E N C E S Page 4
Difference Between
UMN Lesion & LMN Lesion.
UMN LESION LMN LESION
1
In this Pyramidal &
Extra-Pyramidal
descending tracts are
involved.
In this a & V motor
neurons of spinal cord &
neurons of cranial nerve
nuclei are involved.
2
Conditions – Occurs
in vascular accidents
& space occupying
lesions.
Conditions – Occurs in
poliomyelitis
3
Nutrition – Group of
muscles affected
Nutrition – Single
muscles are affected.
4
Tone - Increased Tone - lost
5
Power – No loss of
power.
Power - Lost
6
Reflexes – Superficial
& Deep reflexes –
Exaggerated.
Reflexes – Superficial &
deep Reflexes - Lost
7
Babinski’s sign -
Positive.
Babinski’s sign –
Negative
8
Clonus - Present Clonus – Absent
9 Paralysis – Spastic Paralysis – Flaccid.
10
Clasp Knife Reflex –
Present.
Clasp Knife Reflex –
Absent.