Thread by @theneurolander

Head retraction reflex!!!

“the great neurologist and neurosurgeon from Breslau (Wrocław)”

German neurologist and neurosurgeon Otfrid Foerster (1873–1941)

#MedTwitter #neurotwitter #EndNeurophobia #tweetorials

1/

History

Head retraction reflex is a “triphasic cutaneomuscular reflex” related to the trigeminal system with some pyramidal control.

2/

Features

“reflex hammer tap below nose with head bent forward cause backward jerk of the head”

- considered a frontal release sign
- hyperreflexia
- triphasic cutaneomuscular reflex

3/

Head retraction reflex: Niemann‐Pick Type C

- considered a frontal release sign
- hyperreflexia
- triphasic cutaneomuscular reflex

doi.org/10.1002%2Fmdc3… via: Mov Disord Clin Pract

4/

Head retraction reflex: Niemann‐Pick Type C

- considered a frontal release sign
- hyperreflexia
- triphasic cutaneomuscular reflex

doi.org/10.1002%2Fmdc3… via: Mov Disord Clin Pract

5/

Head retraction reflex: Niemann‐Pick Type C

- considered a frontal release sign
- hyperreflexia
- triphasic cutaneomuscular reflex

doi.org/10.1002%2Fmdc3… via: Mov Disord Clin Pract

6/

Head retraction reflex: p.R392H mutation in GLRA1

- exaggerated response
- considered a frontal release sign
- hyperreflexia
- triphasic cutaneomuscular reflex

jle.com/10.1684/epd.20… via: Epileptic disorders

7/

Head retraction reflex: GLRA1 mutation

- exaggerated response
- considered a frontal release sign
- hyperreflexia
- triphasic cutaneomuscular reflex

doi.org/10.1002/mds.24… via: Mov Disord

8/

Head retraction reflex: GLRA1 mutation

- exaggerated response
- considered a frontal release sign
- hyperreflexia
- triphasic cutaneomuscular reflex

doi.org/10.1002/mds.24… via: Mov Disord

9/

Head retraction reflex: GLRA1 mutation

- exaggerated response
- considered a frontal release sign
- hyperreflexia
- triphasic cutaneomuscular reflex

doi.org/10.1002/mds.24… via: Mov Disord

10/

Head retraction reflex: GLRA1 mutation

- exaggerated response
- considered a frontal release sign
- hyperreflexia
- triphasic cutaneomuscular reflex

doi.org/10.1002/mds.24… via: Mov Disord

11/

Head retraction reflex: GLRA1 mutation

- exaggerated response
- considered a frontal release sign
- hyperreflexia
- triphasic cutaneomuscular reflex

doi.org/10.1002/mds.24… via: Mov Disord

12/

Other frontal release signs

Palmar grasp, palmomental, rooting & sucking, snout, glabellar, and corneomandibular

https://twitter.com/theneurolander/status/1592924351640530944

13/