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F C Guinto

Publications and source records attributed to F C Guinto.

64 records · Page 4Linked to original sources
PubMedDate not supplied

Gender differences in source location for the N100 auditory evoked magnetic field.

Auditory evoked magnetic fields were recorded in response to contralateral stimulation over the right hemisphere in 6 adult males and 6 adult females. The data were fit to a model of a current-dipole source in a homogeneous sphere and 5 parameters of the dipole were computed--3 spatial coordinates, orientation, and strength. When average values for the dipole parameters were compared between sexes, it was found that the current source for the N100m is located more than 1 cm posterior in females and is oriented pointing more downward. These findings were replicated in separate measurement sessions. Viewing of individual magnetic resonance images did not reveal a corresponding anatomical disparity in the location of the primary auditory cortex which is assumed to produce the N100m. Therefore, functional organization of the auditory cortex may be different for the sexes.

Adult↗
PubMedDate not supplied

Postoperative atrophy of posterolateral chest wall musculature: CT demonstration.

We review five cases in which CT demonstrated severe unilateral atrophy of the latissimus dorsi muscle. In four of these cases, similar findings were also seen in the inferior portion of the serratus anterior muscle. All patients had undergone thoracic surgery on the ipsilateral side 10 months to 3 1/2 years prior to CT. All patients had undergone posterolateral thoracotomy, including one who had undergone successive right and left posterolateral thoracotomies. The most likely explanation for the CT finding of atrophy is denervation injury resulting from surgical incision. We discuss normal innervation of the posterolateral chest wall musculature, with emphasis on the relationship of unilateral atrophy of posterolateral chest wall musculature to previous surgical incision.

Adult↗
PubMedDate not supplied

Metrizamide shuntography for evaluation of shunt malfunction in hydrocephalus.

Ventricular shunts were evaluated by a shuntographic technique using metrizamide for the contrast material and delayed spot films and computed tomography (CT) to evaluate shunt function. Thirty hydrocephalic patients were studied who had clinical presentations of shunt malfunction. Fifty-two shuntograms were obtained; most demonstrated the cause of shunt malfunction. No contrast-related complications resulted from the procedure. Diagnostic accuracy was greatly improved by this method, since both anatomic and functional evaluations could be performed. In patients with normal studies, unnecessary surgery was eliminated; in abnormal shuntograms, the duration of surgery and the likelihood of complications were reduced because the surgeons knew the exact anatomic derangements to be corrected.

Cerebrospinal Fluid Shunts↗