Knee Jerk Reflex - Everything You Need To Know - Dr. Nabil Ebraheim

Dr. Ebraheim’s educational animated video describes the knee jerk reflex or Patellar reflex and its meaning and indications.
The knee jerk reflex or patellar reflex is a deep tendon reflex seen as a sudden kicking movement of the lower leg in response to a sharp tap on the patellar tendon.
Tapping the patellar ligament stimulates the muscle spindles in the quadriceps.
Impulses travel from the muscle spindles to the spinal cord. In the spinal cord, synapses occur with motor neurons and interneurons. The motor (efferent) neurons send activating impulses to the quadriceps causing the muscles to contract and extend the knee. The interneuron (relay neuron) forms a connection between the other neurons and interneurons. Interneurons are neither motor nor sensory. Interneurons transmit impulses that inhibit the antagonistic muscles (hamstrings).
An abnormality of the reaction suggests that there may be damage to the central nervous system.
Become a friend on facebook:

Follow me on twitter:

[Short-Movie-Clip-LxO]

this vdo is really awesome, ,short but full meaning, ,perfect step to step, , , GREAT.
I am a medical student, so i want to say, , thanks you.

[marisacerasoli]

I have many knees and this works for all of them!! Thank!

[mrmuscle]

SIR, YOU ARE DOING GREAT JOB, I AM A PMR SPECIALIST IN KUWAIT AND I REALLY ENJOYING YOUR VIDEOS .. THANKS

[nusinvanwinkle]

I wish you would also show the alpha-gamma coactivation in the video! Awesome, I like it!

[mustafamazin]

Hi dir I want to ask you something about the program that you have been using for design this video

[nancymckeown]

My 94 yr old mother has an odd response to this test. If you tap on one knee both legs have a robust response at the same time. We have to warn Drs before that she will kick them. No one has been able to explain why this happens

[zicmessi]

choose eiher one to examine the pt. or we should use both ways? - upside/ downside of the patella hammer

[drshariqazmi]

can't get over with the background music

[Rollwithit]

I have had L'hermittes sign since 1988 with no treatment or explanation. Last year it was noticed I have no knee jerk/patellar reflexes.
I have fibromyalgia, migraines, extreme jaw tension and clenching (has necessitated all molars to be crowned with several cracking and needing recrowning).
Any thoughts, please?

[mirzaljubovic]

Thank you for your videos, I'm intrested in PCL and MCL reconstruction couse i had in a past surgery where i torn ACL, PCL and MCL.... I still have problems with that knee and never recovery full... Cheers

[Wildlifesupernannyfan]

I do knee reflex because it feels therapeutic and I am trying to make my muscle spindle work.

[Ballistichydrant]

What kind of damage to the nervous system?

[kalasatwater]

Mine kicks like crazy with just a little tap lol

[anupamdas]

Sir what is the name of effector organ in knee jerk reflex?

[outofcharge]

didnt work for me, my leg knee just hurts now😭

[mouliasnestoras]

Is it abnormal that my leg kicks way to much?

[anupamdas]

Sir what is the name of effector organ in knee jerk reflex?