Efferent arm of gag reflex

[lakerfan38]

Kaplan says that for gag reflex: ipsilateral CN IX(afferent arm), bilateral CN X(efferent arm)

First Aid says: CN IX(afferent arm), CN IX and X(efferent arm)

---

Members don't see this ad.

 

[ijn]

Kaplan says that for gag reflex: ipsilateral CN IX(afferent arm), bilateral CN X(efferent arm)

First Aid says: CN IX(afferent arm), CN IX and X(efferent arm)

I mean if you consider the salpingopharyngeus and the pharyngeal plexus to the constrictor muscles as part of the gag reflex, then it'd be both IX and X.

 

[Morsetlis]

CN IX should innervate STYLOpharyngeus and the Pharyngeal plexus, which then innervates the constrictors. However, I have always heard that CN IX only innervates Stylopharyngeus, which then makes CN X the chief source of the motor innervation to the pharyngeal plexus.