Reflex assessment is an essential part of neurological examination when suspecting radiculopathy as abnormal deep tendon reflexes may help you identify the pathological disc level. in their systematic review from 2017, Lemeunier et al. report that a complete peripheral neurological examination when suspecting cervical radiculopathy has a sensitivity of 83% and specificity of 28%. The positive and negative likelihood ratios were 1.15 and 0.6 respectively, which is why we attribute this assessment a rather weak clinical value but it is still the best tool we have.
The most important upper extremity reflexes are the biceps tendon reflex for levels C5, C6 and the triceps tendon reflex for level C7.
You can grade the reflex according to a commonly used 5 grade scale:
0=no response, which is always abnormal
1+=slight but definitely present response, which may or may not be normal
2+=brisk response, which is usually considered normal
3+=very brisk response, which may or may not be normal
4+=clonus, which is always abnormal
Biceps Reflex: 24% Sn, 95% Sp
With the patient in a recumbent position, slightly flex the forearm, palpate the biceps tendon and apply a brisk tap to it using a reflex hammer.
Bring the patient’s arm into slight abduction and with the relaxed forearm hanging freely. To elicit the triceps reflex, tap the tendon at the proximal to the olecranon.
21 OF THE MOST USEFUL ORTHOPAEDIC TESTS IN CLINICAL PRACTICE
Other parts of the neurological examination of the upper limb are:
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