LMN Pathology Flashcards
Diseases of Motor-Sensory Unit
LMN vs UMN
🧠⚡ STORM Baby⚡
🧠⚡ UMN WISE⚡
Anterior Horn Cells
Disorders
🧠⚡Motor-SHIP ⚡
Spinal Muscle Atrophy
Motor Neuron Disease
Polio
Hirayama’s Disease
Intramedullary Syringomyelia
Pure MOTOR LMN LESIONS
🧠⚡ANM ⚡
Anterior Horn cell
Neuromuscular Junction
Muscle
LMN Lesion with SENSORY MOTOR Dysfunction
🧠⚡GRP (group) Nervous ⚡
Ganglion : Ganglionopathy
Root : Radiculopathy
Plexus : Plexopathy
Nerves : Neuropathy
Roots/Radicles formed by
Both sensory and motor components of the spinal segment
Ex - C5, C6, T1, T7, any segment
🌸 TYPES of RADICULOPATHY
🧠⚡ Compress⚡
✨ COMPRESSIVE/CLASSICAL
✨ NON COMPRESSIVE
⚡⚡ MOST COMMON CAUSE of COMPRESSIVE RADICULOPATHY
Intervertebral Disc Prolapse IVDP
Causes of NON COMPRESSIVE RADICULOPATHY
Infections:
CMV
GBS
Classical vs Non-classical RADICULOPATHY
🧠⚡classical Radical more disturbed ⚡
Classical
U/L
PAINFUL
ASYMMETRICAL
Non compressive
POLYRADICULONEUTOPATHY
B/L
PAINLESS
SYMMETRIC
PROXIMAL WEAKNESS & PROGRESSIVE
Dermatomes
Rule of 4
🧠⚡ 4 word things⚡
4 Rule - 4 of all Segments supplies Areas with 4 words:
C4 - NeckLace
T4 -Boob(Nipples)
L4 -Knee
S4 -Anus(Anus is actually S5 but the perianal area is S4)
Cervical ROOTS
Dermatome
C2- Supplies an area that looks like ahelmet with a strap to be tied below the chin
C4- NeckLace/ Trapezius
C3is the area between those two
C5: Deltoid
Thumb is C6. Always remember this.
C6 also supplies a part of the index finger. Join thumb and index with tips(looks like a 6)
C7 Index, middle and part of Ring finger
C8 and T1 Little finger
Thoracic Roots
Thoracic roots
The entire area supplied by these roots make theletter T. Thelimbs of Tare the topmost, so obviously is supplied byT1.
T4is the level ofBoob(Nipple)
T10- Belly ButTEN(Umbilicus)
Lumbar Roots
Lumbar roots
Supplies theLegs andLoin.
L1-1nguinaLArea ( Inguinal Area Is L1)
L4-Knee
L5- Middle part of the supply of Sole of the foot is somewhattriangular.Like an inverted V. Roman for 5.
On the dorsal aspect of the foot S5 supplies the middle three toes.
TheGreat toeis supplied byL4. (Remember TheGreat Fire(4)of London)
All segments are parallel to the Inguinal ligament
Sacral Roots
DERMATOME
Sacral roots
The sacral supplies start off on the sacral area which do so in a concentric fashion. S1 to S5 out to in.
S5 being the anus. S4 is the perianal area.
S2 and S3 are FREE and roam down the perineum and supply the genital area as well.
S1 and S2 go down on the post aspect of the leg till the foot.
As they continue down and S1 being above S2, S2 obviously will be lateral and end up supplying the lateral aspect of the foot and the little toe. Little toe is smallest of the lot (1).
So the foot is supplied by L4 L5 S1.
Dermatome and Myotomal Disturbution of UPPER LIMB
