- What is a normal reaction for the Achilles reflex?
- Why the knee jerk and Achilles reflexes are important in walking?
- What does an abnormal patellar reflex indicate?
- Does height affect ankle jerk reflex?
- What nerve controls patellar reflex?
- Does the knee jerk reflex involve the brain?
- What is the advantage of having reflex reactions?
- How do you check your Achilles tendon?
- How does the Achilles reflex protect us?
- Do reflexes involve the brain?
- What does it mean if you have no reflexes in your legs?
- How is the patellar reflex important in walking?
- What is the patellar reflex test used for?
- What happens during the patellar reflex?
What is a normal reaction for the Achilles reflex?
Achilles tendon reflex.
In a normal test, your foot will move as though you were going to point your toes.
A decreased or absent reflex may mean that there is compression in the S1 region..
Why the knee jerk and Achilles reflexes are important in walking?
The Patellar Reflex and the Achilles Reflex The result is the contraction of the quadriceps muscle, causing knee extension. … When the Achilles tendon (calcaneal tendon) is tapped with a reflex hammer, the normal reflex causes plantar flexion of the foot due to the contraction of the gastrocnemius muscle.
What does an abnormal patellar reflex indicate?
Abnormal patellar tendon reflexes can indicate neurological disease.  In particular, diminished reflex responses are associated with the peripheral nervous system (PNS) disorders, while hyper reflexive responses are related to the central nervous system (CNS) disorders.
Does height affect ankle jerk reflex?
The latency of all responses significantly increased with subjects’ height. The slope of the regression lines, for the MLRs versus height was significantly steeper than that for the SLRs. The conduction velocity of the afferent fibres mediating the FDB MLR, calculated on the basis of the regression, was 17.5 m/s.
What nerve controls patellar reflex?
Although the knee jerk reflex is mediated by the L3 and L4 nerve roots, evidence exists that altered knee jerk expression may occur with exclusively L5 radiculopathy.
Does the knee jerk reflex involve the brain?
Doctors will test reflexes by tapping the tendon just below the knee, and this causes the leg to kick out. This knee-jerk reflex is an example of a simple monosynaptic reflex. … This quick response is called a reflex, and reflexes occur without conscious thinking or planning, meaning the brain is not involved in them.
What is the advantage of having reflex reactions?
Reflex actions allow a quick response to danger. One of the main advantages of reflex actions is that they occur rapidly and allow you to avoid danger. So, the choice that is not an advantage of having reflex actions is reflex actions prevent a person from feeling pain.
How do you check your Achilles tendon?
During the physical exam, your doctor will inspect your lower leg for tenderness and swelling. Your doctor might be able to feel a gap in your tendon if it has ruptured completely. The doctor might ask you to kneel on a chair or lie on your stomach with your feet hanging over the end of the exam table.
How does the Achilles reflex protect us?
The ankle jerk reflex, also known as the Achilles reflex, occurs when the Achilles tendon is tapped while the foot is dorsiflexed. It is a type of stretch reflex that tests the function of the gastrocnemius muscle and the nerve that supplies it. … Being a deep tendon reflex, it is monosynaptic.
Do reflexes involve the brain?
The path taken by the nerve impulses in a reflex is called a reflex arc. In higher animals, most sensory neurons do not pass directly into the brain, but synapse in the spinal cord. … Reflexes do not require involvement of the brain, although in some cases the brain can prevent reflex action.
What does it mean if you have no reflexes in your legs?
When reflex responses are absent this could be a clue that the spinal cord, nerve root, peripheral nerve, or muscle has been damaged. When reflex response is abnormal, it may be due to the disruption of the sensory (feeling) or motor (movement) nerves or both.
How is the patellar reflex important in walking?
The alternating contraction between the front leg muscles and back leg muscles allows us to walk. Hitting the tendon below the knee cap (the patellar tendon) stretches the tendon just like when the back of your leg contracts.
What is the patellar reflex test used for?
The patellar reflex test is performed to determine the integrity of the neurological function, which is accomplished by hitting the patellar tendon below the knee cap with a test hammer .
What happens during the patellar reflex?
Knee-jerk reflex, also called patellar reflex, sudden kicking movement of the lower leg in response to a sharp tap on the patellar tendon, which lies just below the kneecap. … In reaction these muscles contract, and the contraction tends to straighten the leg in a kicking motion.