~BN06 CNS Anatomy Brainstem & Spinal Cord

~BN06 CNS Anatomy Brainstem & Spinal Cord - via...

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CNS Anatomy: Brainstem & Spinal Cord Lecture 6
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Mesencephalon Surrounds cerebral aqueduct Tectum Superior Colliculi - vision Inferior Colliculi - audition Tegmentum ~
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Thalamus Tectum Superior Colliculi Inferior Colliculi
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Tegmentum Periaqueductal Gray analgesia Reticular Formation – sleep and arousal attention Red Nucleus and Substantia Nigra motor system Ventral Tegmental Area (VTA) reinforcement ~
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PAG Substantia Nigra Reticular formation Cross-section of Tegmentum Ventral Tegmental Area Dorsal Red Nucleus
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Metencephalon Surrounds fourth ventricle Cerebellum coordinates movements Pons Sleep and arousal Reticular formation ~
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Cerebellum Pons
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Medulla - “Vital Centers” Reticular formation ~ Myelencephalon
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Thalamus Medulla
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Dorsal Ventral White Matter Gray Matter Central Canal Spinal Cord
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Dorsal Ventral Dorsal Lateral Ventral Horns
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Spinal cord Dorsal horn sensory input
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Unformatted text preview: via dorsal root ganglion Lateral horn - autonomic N.S. Ventral horn motor output via ventral root ~ Clinically important anatomy Descending & ascending tracts Motor 1. corticospinal tract distal muscles only descending tract with overt effects ~ Spinal Cord Tracts Spinal Cord Tracts Sensory 2. Dorsal column-medial lemniscal tract touch, vibration, & proprioception axons ascend ipsilaterally synapse then decussate at medulla 3. Spinothalamic tract (lateral) pain & temperature decussate at SC entry level ascends contralaterally ~ Medulla Dorsal column-medial lemniscal path Spinothalamic path Corticospinal tract Dorsal Ventral Dorsal columns Spinal Cord anterolateral columns Corticospinal tract Rubrospinal tract...
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~BN06 CNS Anatomy Brainstem & Spinal Cord - via...

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