🩺 Med students, PT/OT students, or anyone who has an exam on Monday.
(Answers: 1 – Left lateral spinothalamic; 2 – Medulla (pyramidal decussation); 3 – Spinocerebellar)
These pathways carry information from peripheral sensory receptors upward to the brain. Most involve a :
Descends uncrossed in the anterior funiculus. It typically decussates at the target spinal segment via the anterior white commissure to control axial and proximal limb muscles (posture). The Extrapyramidal System ascending and descending tracts of spinal cord ppt
The of the spinal cord are organized bundles of nerve fibers in the white matter that facilitate communication between the body and the brain. Ascending tracts are sensory , carrying information from the periphery to the brain, while descending tracts are motor , transmitting commands from the brain to muscles and glands. I. Ascending Tracts (Sensory Pathways)
This blog post breaks down the complex highway system of the spinal cord , specifically focusing on the descending tracts
(Anterior and Posterior) Carry unconscious proprioception to the cerebellum for coordination and posture. 2. Descending (Motor) Tracts 🩺 Med students, PT/OT students, or anyone who
– Highlight the Pyramidal Decussation (Medulla) and break down Lateral vs. Anterior tracts.
pathways. They carry sensory data from your peripheral receptors (like your skin and joints) up to the brain for processing. Dorsal Column-Medial Lemniscus (DCML) System
Never present text alone. Dedicate a full slide to a high-resolution, labeled cross-section of the spinal cord to map out where each tract resides. It typically decussates at the target spinal segment
Decussates in the caudal medulla (pyramidal decussation) and descends in the lateral funiculus. It controls fine movement of distal limbs.
Carries coordinates regarding motor commands and limb movements. Axons decussate in the spinal cord, ascend to the pons, and cross back over (double decussation) to enter the cerebellum via the superior cerebellar peduncle .
Originates in the superior colliculus of the midbrain. It decussates rapidly and coordinates reflex postural movements of the head and neck in response to sudden visual or auditory stimuli. Section 3: Clinical Correlations & Pathology
Progressed neurosyphilis selectively destroys the posterior columns (DCML). Patients experience a progressive loss of coordination, a stamping gait, and inability to stand steadily with eyes closed ( positive Romberg test ).