Reflexes

What is a reflex?

An action that is performed without conscious thought as a response to a stimulus.

Why check reflexes?

Checking for possible damage within the nervous system.

3 responses Hyporeflexia Hyperreflexia Normal

The 3 Reflex Responses

Hyporeflexia Absent or decreased movement Problem peripheral nervous tissue▪ Trauma, impingement, or entrapment

Hyperreflexia Increased movement Lesion in the spine above the level of the

reflex Normal

Normal movement

Reflex Locations

Cervical Nerves Biceps Tendon Triceps Tendon Brachioradialis Tendon

Thoracic Nerves Abdomen

Lumbar Nerves Patellar Tendon

Sacral nerves Achilles’ Tendon

Babinski’s Reflex

The sole of the foot is firmly stroked Great toe extension Other toes fan out Occurs in children 2 years and

younger

Video

http://www.youtube.com/watch?v=7h5o-FJUDRA

Biceps Tendon Reflex

Grasp patient’s elbow with one hand, placing your thumb on the biceps tendon

Cradle patient’s forearm with elbow in slight flexion

Using the smaller end of the reflex hammer tap your thumb

You should feel or see a contraction

Patellar Tendon Reflex

Position the patient seated with knees off the end of the table

Locate the patellar tendon, just below the patella

Using the larger end of the reflex hammer, tap the tendon

You should see a contraction

References http://www.livestrong.com/article/

188330-the-purpose-of-checking-reflexes/