1 spinal cord

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It consists of: • 1- grey matter • 2- white matter •  Grey matter (nuclei ) include: • 1. Dorsal horn nuclei • 2. Ventral horn nuclei • 3. Lateral horn nuclei • 4. Commissural horn nuclei •  Dorsal horn nuclei include: • 1. Posteromarginal nucleus • 2. Substantia gelatinosa of Rolandi • 3. Main sensory nucleus • 4. Clarke’s nucleus •  Ventral horn nuclei include: • 1. The medial motor nuclei • 2. The lateral motor nuclei • 3. The central motor nucleus •  lateral horn nuclei include: • 1. Sympathetic nucleus • 2. parasympathetic nucleus •  The white matter contains: The tracts of the spinal cord • Short tracts • 1- Fasciculi proprii tracts. • 2- Comma – shaped tract. • 3- Septomarginal tract. • 4- Lissauer’s tract. • long tracts: • 1- Ascending sensory tracts: • 2- Descending motor tracts: • The ascending sensory tracts are: • tracts carry conscious sensations which are felt (4) • 1) Lateral spinothalamic tract • 2) Ventral spinothalamic tract • 3) Gracile tract • 4) Cuneate tract • tracts carry unconscious sensations which are not felt (4) • 1) Dorsal spinocerebellar tract • 2) Ventral spinocerebellar tract • 3) Spinoolivary • 4) spinitectal • Pyramidal tract • 1) Corticospinal fibers • 2) Corticobulbar fibers • Extrapyramidal tract • 1- Rubro-spinal tract. • 2- Tecto-spinal tract. • 3- Vestibulo- spinal tract. • • for contact • [email protected] • Telegram channel • https://t.me/dr_shereenhamed • Telegram chat group • https://t.me/joinchat/QU7iQhkPBrdXh18... • faculty of medicine • Mansoura university • for contact • [email protected] • Telegram channel • https://t.me/dr_shereenhamed • Telegram chat group • https://t.me/joinchat/QU7iQhkPBrdXh18... • faculty of medicine • Mansoura university • 4- Sulcomarginal tract. • • for contact • [email protected] • Telegram channel • https://t.me/dr_shereenhamed • Telegram chat group • https://t.me/joinchat/QU7iQhkPBrdXh18... • faculty of medicine • Mansoura university • for contact • [email protected] • Telegram channel • https://t.me/dr_shereenhamed • Telegram chat group • https://t.me/joinchat/QU7iQhkPBrdXh18... • faculty of medicine • Mansoura university • 5- Medial reticulo-spinal tract. • 6- Lateral reticulo-spinal tract • Extrapyramidal tract • 1) Corticospinal fibers • 2) Corticobulbar fibers • 1- Rubro-spinal tract. • 2- Tecto-spinal tract. • 3- Vestibulo- spinal tract. • 4- Sulcomarginal tract. • 5- Medial reticulo-spinal tract. • 6- Lateral reticulo-spinal tract • 4) Spinotectal tract • • 1) Dorsal spinocerebellar tract • 2) Ventral spinocerebellar tract • 3) Spinoolivary tract. • 4) Spinotectal tract

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