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Biomedical subjects

V M Synek

Publications and source records attributed to V M Synek.

41 records · Page 3Linked to original sources
PubMedDate not supplied

Saphenous nerve evoked potentials and the assessment of intraabdominal lesions of the femoral nerve.

A technique for recording somatosensory evoked potentials after stimulation of the patellar branch of the saphenous nerve is described and the results from 11 normal subjects and from two patients with intraabdominal femoral nerve injuries are presented. One patients developed a nerve lesion after an abdominal surgical procedure and the second suffered a gunshot wound causing femoral nerve paralysis. Both patients recovered spontaneously. Evoked potentials from saphenous nerves showed a significant discrepancy between faster motor recovery and delay in reinstating sensory axonal conduction.

Abdomen↗
PubMedDate not supplied

Assessing sensory involvement in lower limb nerve lesions using somatosensory evoked potential techniques.

Somatosensory evoked potential (SEP) investigations in 18 patients with lower limb lesions are summarized. Seven patients had problems involving the lateral femoral cutaneous nerve, four the femoral nerve, and seven the sciatic nerve. All lesions were unilateral. SEP techniques were accurate in meralgia paresthetica, and all five patients with demonstrable SEP abnormalities were successfully treated surgically. Delayed recovery of sensory function was shown in two patients with femoral nerve lesions and two patients with sciatic nerve lesions. In patients with sensory symptoms, only an SEP abnormality confined to the nerve distribution provides evidence of a lesion in the sensory pathways and helps to exclude psychologic causes. In a case of peripheral nerve Schwannoma, the presence of a small delay in a case of peripheral SEP supported the preoperative assessment that the tumor was not intrinsic in nature, and this was confirmed at surgery and on subsequent full recovery. The SEP technique allows quantitative assessment of sensory nerve conduction through the peripheral neuron and centripetal pathways.

Adolescent↗
PubMedDate not supplied

Somatosensory evoked potentials from musculocutaneous nerve in the diagnosis of brachial plexus injuries.

A technique for recording somatosensory evoked potentials using stimulation of musculocutaneous sensory nerve fibers proximal to the wrist has been used in 10 normal subjects and in 8 patients with traumatic lesions of proximal parts of the brachial plexus. The technique gave satisfactory evoked potentials in all normal subjects and provided useful information in patients with avulsion of the 5th and 6th cervical roots. The results were similar to those obtained by radial nerve stimulation. The results in 3 patients with upper trunk injuries and in 1 patient with avulsion of the 5th cervical root were unhelpful. In 2 patients with multiple cervical root avulsions the evoked potentials from cervical cord and contralateral scalp were absent and were attenuated at Erb's point. This is the first report where musculocutaneous nerve evoked potentials have been applied to a group of patients.

Adolescent↗