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Spinal cord disorders

Q: Which spinal cord tract carries vibration, proprioception, and fine touch sensation?

The dorsal columns (posterior) carry vibration, proprioception, and fine touch ipsilaterally. This is clinically important when localizing spinal cord lesions.

Q: What is the blood supply to the anterior 2/3 of the spinal cord?

The anterior spinal artery (ASA) supplies the anterior 2/3 of the cord, including motor and spinothalamic tracts. Occlusion leads to anterior cord syndrome.

Q: The sympathetic nervous system originates from which spinal cord levels?

The sympathetic (thoracolumbar) nervous system originates from T1-L2. It is responsible for the fight or flight response and has short preganglionic and long postganglionic fibers.

Q: Which watershed area of the spinal cord is most vulnerable to ischemia?

The thoracic region (T4-T8) is the watershed area of the spinal cord and is most vulnerable to ischemia due to relatively poor blood supply between major arterial territories.

Q: What characterizes the parasympathetic nervous system fibers?

The parasympathetic (craniosacral) system has long preganglionic and short postganglionic fibers. It originates from cranial nerves III, VII, IX, X and S2-S4.

Spinal cord disorders encompass a range of conditions including traumatic injuries, vascular syndromes, inflammatory diseases, infections, and neoplasms that disrupt the critical neural pathways responsible for motor function, sensory transmission, and autonomic control. Understanding the distinct clinical presentations of syndromes such as Brown-Séquard, anterior cord syndrome, and cauda equina syndrome is essential because the pattern of deficits directly localizes the lesion and guides urgent diagnostic workup and management. For medical students, mastering spinal cord anatomy and recognizing these syndromes is fundamental to neurological examination skills and critical for identifying emergencies like cord compression that require immediate intervention to prevent permanent disability.

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1. Which spinal cord tract carries vibration, proprioception, and fine touch sensation?

2. What is the blood supply to the anterior 2/3 of the spinal cord?

3. The sympathetic nervous system originates from which spinal cord levels?

4. Which watershed area of the spinal cord is most vulnerable to ischemia?

5. What characterizes the parasympathetic nervous system fibers?

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Spinal cord disorders

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