NeuroTeach 20 - Head retraction reflex

 Head retraction reflex!!!

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

German neurologist and neurosurgeon Otfrid Foerster (1873–1941)

2) History

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

3) 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

4) Head retraction reflex: Niemann-Pick Type C

5) Head retraction reflex: Niemann-Pick Type C

6) Head retraction reflex: Niemann-Pick Type C

7) Head retraction reflex: p.R392H mutation in GLRA1

8) Head retraction reflex: GLRA1 mutation

9) Head retraction reflex: GLRA1 mutation

10) Head retraction reflex: GLRA1 mutation

11) Head retraction reflex: GLRA1 mutation

12) Head retraction reflex: GLRA1 mutation

13) Other frontal release signs

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