Walter Eric Johnson (wej3715 at scully.tamu.edu) wrote:
> Kalman Rubinson (kr4 at is2.nyu.edu) wrote:
> : Walter Eric Johnson (wej3715 at scully.tamu.edu) wrote:
> : > Which reflexes involve the brain for the processing? Even the corneal
> : > reflex, as near as the brain is, is entirely processed within the
> : > trigeminal nerve.
> :
> : How do you figure that? The afferent limb is the trigeminal nerve and the
> : efferent limb is the facial nerve. Where is the connection if not in the
> : brainstem?
>> I either misunderstood whatever gave me that idea or the source was
> wrong (probably the former). In another source that I just looked in
> is the following: "Unilateral lesions of nerve V, the tegmentum of
> the pons, or the facial nerve alter this reflex." So you are
> entirely correct.
BTW, there are many reflexes, all of which involve at least one synapse in the CNS.
Local (peripheral) responses are not really reflexes.
Kal
