Ascending And Descending Tracts Of Spinal Cord Ppt Review

| Feature | Ascending | Descending | |---------|-----------|-------------| | Direction | To brain | From brain | | Type of info | Sensory | Motor | | Main example | Spinothalamic | Corticospinal | | Decussation site | Varies (cord or medulla) | Mostly medulla | | Clinical lesion effect | Sensory loss | Motor paralysis |

Pathway:

Key term: Immediate decussation in spinal cord.

Example tract slide (Dorsal column–medial lemniscus):

Example tract slide (Lateral corticospinal):

Clinical correlation example (Brown-Séquard):

Title: Organization of Spinal Cord Tracts Content:

General Rule: Most tracts cross over (decussate) to the opposite side of the brain (contralateral control).

Open floor for questions.

References: Snell's Clinical Neuroanatomy, Haines' Neuroanatomy Atlas, Nolte's Principles of Human Neuroanatomy.

| Tract | Type | Crosses | Function | |-------|------|---------|----------| | Lateral Spinothalamic | Ascending | Spinal cord | Pain, temp | | Dorsal Column | Ascending | Medulla | Fine touch, vibration | | Lateral Corticospinal | Descending | Medulla | Voluntary movement | | Vestibulospinal | Descending | No | Balance, extensor tone |

Key term: Decussation in medulla.

Title: Ascending and Descending Tracts of the Spinal Cord Subtitle: Functional Anatomy and Clinical Significance Presenter Name: [Your Name] Date: [Date]