Lacrimation reflex
| Headline | |
|---|---|
| Stimulus | physical/chemical stimuli to cornea yawning, vomiting, emotional upset bright light |
| Afferent | Ophthalmic nerve CN V1 - Superior salivatory nucleus in pons - fibres run with facial nerve - parasympathetic fibers leave CNVII as the greater superficial petrosal nerve and synapse in the sphenopalatine ganglion |
| Efferent | - Postganglionic fibers travel with the lacrimal nerve to reach the lacrimal gland and cause reflex tearing. |
| Response | Tearing |
Bogorad syndrome/"crocodile tears" - inappropriate reflex when eating!