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Short-latency somatosensory evoked potentials (SSEPs) of the tibial nerves in spinal cord injuries. 1992

A Kovindha, and R Mahachai
Rehabilitation Medicine Division, Faculty of Medicine, Chiang Mai University, Thailand.

Stimulations of the tibial nerves of 76 spinal cord injured patients revealed short-latency somatosensory evoked potentials (SSEPs) especially P37 recorded from the scalp. The SSEPs findings can be classified by degrees of impairment into 5 different types as follows: Type 1: Absence of P37. This was found in all patients with complete cord lesions as well as patients with loss of joint sense. Type 2: Decreased amplitude and prolonged latency. This was elicited in patients with moderate to severe central cord lesions. Type 3: Prolonged latency only. Type 4: Decreased amplitude only. Type 5: Normal P37, which was mostly seen in patients with mild central cord lesion. The study demonstrated that SSEPs of the tibial nerves are related to joint sense and seem to relate to the extent of cord damage, especially of central cord and complete cord lesions. It can be done as early as during the first week post injury, particularly in an uncooperative patient suspected of having spinal cord injury, in which case the clinical assessment may be difficult and unreliable.

UI MeSH Term Description Entries
D005073 Evoked Potentials, Somatosensory The electric response evoked in the CEREBRAL CORTEX by stimulation along AFFERENT PATHWAYS from PERIPHERAL NERVES to CEREBRUM. Somatosensory Evoked Potentials,Evoked Potential, Somatosensory,Somatosensory Evoked Potential
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D013119 Spinal Cord Injuries Penetrating and non-penetrating injuries to the spinal cord resulting from traumatic external forces (e.g., WOUNDS, GUNSHOT; WHIPLASH INJURIES; etc.). Myelopathy, Traumatic,Injuries, Spinal Cord,Post-Traumatic Myelopathy,Spinal Cord Contusion,Spinal Cord Laceration,Spinal Cord Transection,Spinal Cord Trauma,Contusion, Spinal Cord,Contusions, Spinal Cord,Cord Contusion, Spinal,Cord Contusions, Spinal,Cord Injuries, Spinal,Cord Injury, Spinal,Cord Laceration, Spinal,Cord Lacerations, Spinal,Cord Transection, Spinal,Cord Transections, Spinal,Cord Trauma, Spinal,Cord Traumas, Spinal,Injury, Spinal Cord,Laceration, Spinal Cord,Lacerations, Spinal Cord,Myelopathies, Post-Traumatic,Myelopathies, Traumatic,Myelopathy, Post-Traumatic,Post Traumatic Myelopathy,Post-Traumatic Myelopathies,Spinal Cord Contusions,Spinal Cord Injury,Spinal Cord Lacerations,Spinal Cord Transections,Spinal Cord Traumas,Transection, Spinal Cord,Transections, Spinal Cord,Trauma, Spinal Cord,Traumas, Spinal Cord,Traumatic Myelopathies,Traumatic Myelopathy
D013979 Tibial Nerve The medial terminal branch of the sciatic nerve. The tibial nerve fibers originate in lumbar and sacral spinal segments (L4 to S2). They supply motor and sensory innervation to parts of the calf and foot. Medial Plantar Nerve,Posterior Tibial Nerve,Medial Plantar Nerves,Nerve, Medial Plantar,Nerve, Posterior Tibial,Nerve, Tibial,Nerves, Medial Plantar,Nerves, Posterior Tibial,Nerves, Tibial,Plantar Nerve, Medial,Plantar Nerves, Medial,Posterior Tibial Nerves,Tibial Nerve, Posterior,Tibial Nerves,Tibial Nerves, Posterior

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