Survey
* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project
Download Spinal Cord - Bellarmine University
Document related concepts
no text concepts found
Transcript
Spinal Cord Medical Neuroscience Dr. Wiegand Directions dorsal rostral ventral caudal Terms rostral - toward the “beak” caudal - toward the “tail” ventral - toward the front (anterior) dorsal - toward the back (posterior) superior - above inferior - below Spinal Cord Central gray nuclei and outer white matter (tracts) Descending Cell bodies tracts Peripheral nerve fibers Ascending tracts Peripheral and Central Nervous System PNS sensory motor Lesions CNS Spinal nerves & cord 31 pairs with anterior and posterior root C1 often doesn’t have posterior root Spinal cord enlarged in C5 – T1 and L2 – S3 levels Spinal cord ends at L1 vertebral level Dermatomes & Myotomes Dermatome – an area of skin innervated by a single posterior root Myotome – a group of muscles innervated by a single anterior root C4 T4 T10 L3 Dermatomes L5 Myotomes Stretch Reflexes Examples: C5-6 = biceps tendon C6 = brachioradialis C7-8 = triceps tendon L2-4 = patellar tendon S1-2 = Achilles tendon External Spinal Cord Conus medullaris Filum terminale Cauda equina Dura mater External Structure – Spinal Cord Posterior Median Sulcus Lateral sulci Posterior Intermediate Sulci Anterior Median Fissure Internal Structure – White Matter Posterior Funiculi Lateral Anterior White Matter Organization: Ascending Pathways Posterior Columns Lateral & Anterior Spinothalamic Tracts Posterior & Anterior Spinocerebellar Tracts White Matter Organization: Descending Pathways Lateral Corticospinal Tract Rubrospinal Tract Reticulospinal Tracts Anterior Corticospinal Tract Vestibulospinal Tracts White Matter Organization: Intersegmental Pathways Lissauer’s Tract Intersegmental Tracts White Matter Organization: Ascending Pathways Posterior Columns Lateral & Anterior Spinothalamic Tracts L N White Matter Organization: Descending Pathways Legs T A Neck Grey Matter Organization Posterior Motor Groups Intermediate Anterior Lateral Medial Grey Matter Organization: Anterior Cell Columns Grey Matter Organization: Lateral Grey Horns: T1 – L2/3 AKA Intermediolateral Cell Column Grey Matter Organization: Posterior Cell Column Dorsomarginal nucleus Substantia gelatinosa Nucleus proprius Nucleus dorsalis (Clarke’s column) From Pritchard & Alloway: Fig. 3-7 http://lansing.bellarmine.edu/ pt/atlas/cover.html Rexed Lamina Dorsomarginal n. Substantia gelatinosa Nucleus proprius Nucleus dorsalis (Clarke’s column) Motor nuclei Brown-Sequard Syndrome
Related documents