LAB 3: BRAINSTEM - INTERNAL STRUCTURE, TRACTS, CRANIAL NERVES, EYE MOVEMENTS

Student Preparation Guide

Objectives

  • Describe the major surface markings, including cranial nerve roots, of the brainstem and how they relate to tracts and structures within the brainstem.
  • Compare and contrast the corticobulbar tract to the corticospinal tract.
  • Describe the functional anatomy of the ascending and descending medial longitudinal fasciculus (MLF).
  • Identify the cranial nerves involved in eye movements on the surface of the brainstem and identify their nuclei within the brainstem on cross sections.
  • Explain the underlying pathways and connections of horizontal eye movements for saccadic and pursuit movements as well as the vestibulo-ocular reflex.
  • Apply the neuroanatomy of the control of eye movements to typical clinical presentations.

Videos


Brainstem Overview & Cranial Nerves

Additional Links


Brainstem Rule of 4

(IMJ clinical tips)

Brainstem Rule of 4

(practical neurology article)

Extraocular Muscle Function

(clinical exam model)
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