Biceps tendon reflex

Definition:
The Biceps tendon reflex can be elicited when the biceps brachai tendon is hit with a reflex hammer, thus inducing a contraction of the biceps brachii.

Test procedure:
With the patient lying supine or sat on the examining table, the practitioner holds the patient’s arm at the elbow, and places his/her thumb over the patients Biceps Brachai tendon. The practitioner than strikes his/her own thumb using a reflex-hammer.

Test findings (Positive & Negative results):
A positive finding is characterised by the smooth, rapid contraction of the biceps brachai after it’s tendon has been struck followed by a return to the normal resting tone of that muscle.
When performing this reflex, look out for signs of upper or lower motor neurone lesions.

Considerations:
The Biceps reflex is used to examine the integrity of the C5 reflex arc and to a lesser degree the C6 reflex arc.
A reduced or absent reflex may be indicative of a lower motor neurone lesion at the C5 or C6.