Glabellar Reflex | Parkinson's Exam - MedSchool
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Parkinson's Exam
 
 
Parkinson's Exam
The glabellar reflex is a primitive reflex - normally present in infants and absent in adults. In the case of frontal lobe damage, ‘frontal release' signs such as glabellar, grasp, suck, snout and palmomental reflexes will be present.
 

Glabellar Reflex

 
 

Overview

    • How to Elicit

    • Percuss repeatedly between the eyebrows, looking for reactive blinking.
    • Interpretation

    • Decreased - no blinking in response to stimulusOphthalmic nerve (V1) / facial nerve (VII) palsy, pons / medullary lesion
    • Normal - up to five blinks and then no further blinking following habitualization
  • The glabellar reflex is a primitive reflex - normally present in infants and absent in adults. In the case of frontal lobe damage, ‘frontal release' signs such as glabellar, grasp, suck, snout and palmomental reflexes will be present.
Last updated on April 19th, 2019
 
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