knee jerk reflex I all 4 grades with demo on patients I brisk tendon reflex |rootvalue I neurology

The Knee Jerk /Patellar Reflex : Grading of Reflexes , learn with demonstration on the patients (#MadeEasy)
Can’t remember grading of reflexes ?
Learn grading with examples.
#coticospinaltractdisorders
how to perform knee jerk reflex on a patient?
muscles involved in this knee reflex?
It is a deep tendon reflex.
The patellar reflex is contraction of the quadriceps femoris muscle, with resulting extension of the knee, in response to percussion of the patellar tendon.
A firm tap on the tendon draws the patella down, stretching the quadriceps an provoking reflex contraction.
There is a latency of around 18ms between stretch on the patellar tendon and the beginning of contraction of the quadriceps femoris muscle.

Root Value of the knee reflex :
Femoral nerve (L2-L4)
The #quadriceps muscle is composed of four muscles :

I.Rectus femoris
II.Vastus lateralis
III.Vastus medialis
IV.Vastus intermedius
Grading:
0 = Absent
1+ = Present but diminished
2+ = Normal
3+ = Increased but not necessarily pathological
4+ = Markedly hyperactive/ pathological/sometimes accompanied by sustained clonus
Significance:
Hyperactive reflexes is seen in UMN lesions i.e corticospinal tract disorders.
Hypoactive reflex is seen in LMN lesions i.e in neuropathy, spinal cord disorders.

[@ryLisa2022-k4y]

Wow good job❤

[@srinivasaraosirasapalli5104]

Excellent

[@NEURONBUNDLE]

Thank you so much

[@lorib360]

Thank you - very helpful.

[@dranshumansahu6114]

👌great explainer

[@dhanishasharma8864]

Very informative👍

[@akshisharma7451]

Nice explanation..

[@devyanithakur4313]

Keep up the good work 😀

[@riddhiarora6439]

👏👏