Thread by @theneurolander

Corneomandibular reflex!!!

“there is hardly a more valuable test than this to uncover a supranuclear lesion of the trigeminal nerve”

Russian neurologist Robert Wartenberg (1887–1956)

#MedTwitter #neurotwitter #EndNeurophobia #tweetorials

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History

1902 by German doctor Von Sölder
- first description, normal patients

1918 by German neurologist Ernst Trömner
- rediscovered the reflex

1948 by Russian neurologist Robert Wartenberg
- complete description
- ‘jaw wincking phenomenon’

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Pathophysiology

Mesencephalic trigeminal nucleus
- there is an inhibitory interneuron ipsilateral motor nucleus of V CN

Lesions in cortico-pontine boundaries lesions
- inhibitory influence disappear
- massive activation of trigeminal motor neuron

doi.org/10.4103%2F0976…

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Corneomandibular reflex

representation in pediatric and adult individuals

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Corneomandibular reflex

“stimulation of cornea causes contralateral movement of the mandible”

- usually associated movement > reflex
- supranuclear interruption of ipsilateral corticotrigeminal tract
- ALS

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Corneomandibular reflex

“stimulation of cornea causes contralateral movement of the mandible”

- usually associated movement > reflex
- supranuclear interruption of ipsilateral corticotrigeminal tract
- ALS

via: Neurology Made Interesting

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Corneomandibular reflex

“stimulation of cornea causes contralateral movement of the mandible”

- usually associated movement > reflex
- supranuclear interruption of ipsilateral corticotrigeminal tract
- ALS

via: JAMA Network

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Corneomandibular reflex

“stimulation of cornea causes contralateral movement of the mandible”

- usually associated movement > reflex
- supranuclear interruption of ipsilateral corticotrigeminal tract
- ALS

youtube.com/shorts/jaxIwN-… via: Primeesha Medical Zone

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Other frontal release signs

Palmar grasp, palmomental, rooting & sucking, snout, glabellar, and head retraction reflex



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