Post on 06-Jan-2018
description
Neuroanatomy Lab 1 Module 1.2: The Pons
and Midbrain
Neuroscience BlockDrs. Georgia Bishop and
Chris Pierson
Jacobus Sylvius Thomas Willis
Santiago Ramón y Cajal Paul Edinger
Module Purpose• To facilitate small group
learning by providing step-by-step guidance to assist in the identification of important neuroanatomic structures and relationships while providing a foundation on which to build clinical knowledge and skills
Learning Outcomes/ Competencies
• At the end of this module you will have enhanced your vocabulary and understanding of important neuroanatomical relationships of the pons and midbrain in preparation for more detailed and complicated topics later in the Neuroscience Block and for future clinical applications.
Objectives
• 9971: Explain basic terminology related to the organization of the central and peripheral nervous system.
• 10020: Describe the location and relationships of relevant nuclei in the CNS on gross brain specimens, cross sectional material, and radiographic images.
• 10046: Describe the location and relationships of relevant descending tracts in the CNS on gross brain specimens, cross sectional material, and radiographic images.
Structures of the pons: Anterior
Figure 11.3: J. Nolte The Human Brain: An Introduction to its Functional Anatomy 6th ed
Structures of the pons: Lateral
Figure 11.3: J. Nolte The Human Brain: An Introduction to its Functional Anatomy 6th ed
Clinical correlation• 10 year old girl, 1 week history of gait changes and
headache; Physical examination shows left cranial nerve VI palsy
• MRI revealed a tumor in the pons• Worsening hearing, hyperreflexia, Babinski sign,
weakness with ataxia and dysmetria over time
Pons
Corticospinal tract (CST)Crossing fibers or
transverse pontine fibers (TP)
Middle cerebellar peduncle
Abducens nucleus and nerve fibers
DIPG Diffusion Tensor Imaging
CST
MCP
CTT
TP
Donaldson SS, et al JCO 2006
Anterior
AB
C
MCP
CTT
CST
TP
tumor
tumor
Structures of the midbrain: Anterior
Figure 11.3: J. Nolte The Human Brain: An Introduction to its Functional Anatomy 6th ed
Structures of the midbrain: Posterior
Figure 11.3: J. Nolte The Human Brain: An Introduction to its Functional Anatomy 6th ed
In conclusion….• You should now be able to recognize key neuroanatomic
landmarks and structures of the pons and midbrain• At the end of the lab you should understand a number of
important neuroanatomical relationships of the pons and midbrain
• The relationships emphasized in lab are relevant to actual clinical problems you will encounter in your Neurology clerkship and throughout your career
• You will be expected to use this new vocabulary fluently in the Neuroscience Block as more detailed and complicated topics are introduced and in future clinical applications such as your Neurology clerkship
Thanks! Please address questions to:
• Chris Pierson Christopher.pierson@nationwidechildrens.org
• Georgia Bishop Georgia.Bishop@osumc.edu
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Pons
Midbrain
Midbrain anterior