Face to Face with the Face by R.C.S.T. Thomas Attlee D. O.; Orthodontist) Granville; Tarnowski Wojciech

Author:R.C.S.T., Thomas Attlee D. O.; Orthodontist), Granville; Tarnowski, Wojciech
Language: eng
Format: epub
ISBN: 9780857012258
Publisher: Jessica Kingsley Publishers
Published: 2016-06-20T16:00:00+00:00

Chapter 24

Cranial Nerves III, IV, VI – The Oculo-Motor, Trochlear and Abducent Nerves

Principal functions

Nerve

Type

Function

Cr III Oculo-motor

Motor

Parasympathetic

Eye movement

Pupil constriction, lens accommodation

Cr IV Trochlear

Motor

Eye movement

Cr VI Abducent

Motor

Eye movement

Overview

These three nerves enable us to move our eyes, and are the nerves involved in squints. We will address them together, because they serve similar functions, and because they also follow very similar pathways from the brainstem to the orbit (Figure 24.1). They operate in conjunction with each other, in order to move the eyeball, and thereby direct the gaze in different directions.

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