Orbit and ocular adnexae
Blinking
Reflex blinking
- Caused by various stimuli:
- Optical
- Auditory
- Tactile
- Corneal reflex (touch stimulation) triggers brainstem reflex involving fifth and seventh cranial nerves (cortical function is not needed).
- Sensory ending in corneal epithelium,
- Afferents: long ciliary nerves, nasociliary then ophthalmic
- Synapse…