J J Tomasula

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Two models have been used to study the effects of ethanol on injuries of the central nervous system. The spinal cords of cats were injured by delivering a 200 gm-cm impact to the exposed dura mater. A second group of animals received a similar injury to the exposed dura mater overlying the cerebral hemispheres. The animals were divided into two groups,(More)
Spinal cord injury consistently evokes a transient 3- to 4-minute rise is systemic pressure, followed by prolonged hypotension. Because the role of the sympathetic nervous system in these blood pressure changes is not clear, the pressure responses were studied using systematic ablation of the peripheral sympathetic nervous system. In total, 24 cats were(More)
The effect of naloxone on blood flow and somatosensory evoked potentials was studied in cats subjected to 400 gm-cm contusion injuries of the thoracic spinal cord. Eight cats were treated with 10 mg/kg naloxone 45 to 60 minutes after injury, 11 cats were given 10 ml of saline instead of naloxone, and six cats were neither injured nor treated. Hydrogen(More)
We studied the effect of the opiate antagonist naloxone on the recovery of cats injured with a 400-g-cm impact injury to T-9. The animals were evaluated by recording somatosensory evoked potentials and performing weekly neurological examinations. Several dose schedules were followed. Six of eight cats that received an intravenous or intraperitoneal bolus of(More)
Spinal injury in cats is accompanied by urinary bladder and hind limb dysfunction. Ten cats subjected to spinal contusion at the ninth thoracic segment were treated with guanabenz (an alpha-2 agonist) intraperitoneally (0.65 mg./kg.) three hours after injury, and twice daily for eight weeks. An additional six spinal cats were untreated and served as(More)
A study of the effects of spinal cord injury upon spinal cord blood flow was carried out in cats. A 400 mg-cm impact produced an overall reduction in spinal cord blood flow of 24% in the white matter and 30% in the gray matter, as determined by 14C-antipyrine autoradiography. At the level of the injury, white-matter flow was 8.1 ml/100 gm/min, a reduction(More)
Vestibulospinal tract function was monitored in experimental contusion of the spinal cord in cats, and compared with somatosensory cortical evoked potentials. Both white and gray matter portions of the vestibular and somatosensory pathways were evaluated in cord injuries at T-7 and L-4. Severe contusions of 20 gm-20 cm force impact resulted in a rapid (less(More)
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