RESUMEN
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Asunto(s)
Humanos , Femenino , Mamoplastia/métodos , Mamoplastia/tendencias , Mamoplastia , Implantes de Mama/tendencias , Implantes de Mama , Nervios Torácicos , Nervios Torácicos/fisiopatología , Nervios Torácicos/efectos de la radiaciónRESUMEN
Myelopathy is a severe complication of cervical spondylosis (CS). We studied 27 consecutive patients with CS referred for evaluation for possible myelopathy using transcranial magnetic stimulation. The findings were compared with those from 20 normal controls. Magnetic resonance imaging was utilized to assess the degree of cord compromise. Central motor conduction time (CMCT) abnormalities showed equivalent diagnostic yield with pectoralis major (PM) recordings, as compared with combined first dorsal interossei and abductor hallucis recordings. Our findings show that CMCT measurement with PM recordings is of value as a diagnostic adjunct in the electrophysiological evaluation of myelopathy in CS.
Asunto(s)
Potenciales Evocados Motores/fisiología , Osteofitosis Vertebral/fisiopatología , Nervios Torácicos/fisiopatología , Adulto , Anciano , Estimulación Eléctrica/métodos , Potenciales Evocados Motores/efectos de la radiación , Femenino , Humanos , Imagen por Resonancia Magnética/métodos , Masculino , Persona de Mediana Edad , Tiempo de Reacción/fisiología , Tiempo de Reacción/efectos de la radiación , Osteofitosis Vertebral/patología , Nervios Torácicos/patología , Nervios Torácicos/efectos de la radiaciónRESUMEN
The aim of this study was to measure the motor conduction time (MCT) and velocity of the lateral pectoral nerve (LPN) in normal subjects and patients with neuropathy. For the LPN, we determined thus the average MCT was 3.9 m/s using Erb stimulation with needle recording, and the average motor conduction velocity was 70.6 m/s using Erb stimulation and axilla stimulation with needle recordings in normal subjects. In patients, prolonged MCT in LPN was found in 3 of 6 patients with unilateral plexopathy and 3 of 4 patients with polyneuropathy. It was determined that MCT and motor conduction velocity in LPN was as sensitive as biceps brachii MCT in patients with unilateral plexopathy. Furthermore, the motor conduction velocity in the LPN may be beneficial to elucidate the localization of involvement in polyneuropathies, such as distal or proximo-distal.
Asunto(s)
Conducción Nerviosa/fisiología , Enfermedades del Sistema Nervioso Periférico/fisiopatología , Nervios Torácicos/fisiopatología , Adolescente , Adulto , Estimulación Eléctrica/métodos , Electromiografía , Electrofisiología , Potenciales Evocados Motores/fisiología , Potenciales Evocados Motores/efectos de la radiación , Femenino , Humanos , Masculino , Persona de Mediana Edad , Músculo Esquelético/fisiopatología , Conducción Nerviosa/efectos de la radiación , Tiempo de Reacción , Nervios Torácicos/efectos de la radiaciónRESUMEN
The incidence of long thoracic nerve palsy after radical mastectomy has been documented to be approximately 10%. No cases have been reported after the more recent treatment for breast cancer, lumpectomy with axillary dissection. This more recent surgical procedure is customarily followed by aggressive radiation therapy to the remaining breast tissue. This is the first case report of a patient with radiation-induced long thoracic nerve palsy. The patient was a young woman who underwent left breast quadrantectomy and axillary dissection for breast cancer. After radiation therapy, she had isolated left long thoracic nerve palsy. The diagnosis was confirmed by electrodiagnostic studies. Almost full recovery occurred after 5 months.