Corneal reflex
Corneal Reflex
The Corneal Reflex (pronunciation: /kɔːrˈniːəl ˈriːfleks/), also known as the Blink Reflex, is an involuntary blinking response due to stimulation of the cornea. This reflex is mediated through the trigeminal nerve and the facial nerve.
Etymology
The term "Corneal Reflex" is derived from the Latin word "cornea" which means "horny", due to the tough, horn-like quality of the cornea, and the Latin word "reflexus" which means "bent back".
Function
The Corneal Reflex serves as a protective mechanism for the eye. When the cornea is touched, signals are sent via the trigeminal nerve to the brain, which then sends a signal through the facial nerve to close the eyelids. This helps to protect the eye from potential damage.
Related Terms
- Cornea: The clear front surface of the eye, which covers the iris and pupil.
- Trigeminal nerve: The fifth cranial nerve, which is responsible for sensation in the face and motor functions such as biting and chewing.
- Facial nerve: The seventh cranial nerve, which controls the muscles of facial expression, and functions in the conveyance of taste sensations from the anterior two-thirds of the tongue and oral cavity.
External links
- Medical encyclopedia article on Corneal reflex
- Wikipedia's article - Corneal reflex
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