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Related Experiment Videos

Visual field defects after temporal lobectomy -- comparing methods and analysing resection size.

D Nilsson1, K Malmgren, B Rydenhag

  • 1Göteburg University, Institute of Clinical Neuroscience, Sahlgrenska University Hospital, Blå Stråket 7, 5 tr, S- 413 45 Göteborg, Sweden. daniel.nilsson@neuro.gu.se

Acta Neurologica Scandinavica
|October 13, 2004
PubMed
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Visual field defects (VFD) after temporal lobe resections (TLR) for epilepsy were studied. Resection extent in the anterior superior temporal gyrus correlated with VFD frequency, not surgical approach.

Area of Science:

  • Neurosurgery
  • Ophthalmology
  • Epilepsy Research

Background:

  • Temporal lobe resections (TLR) are performed for intractable epilepsy.
  • Visual field defects (VFD) are a potential complication of TLR.

Purpose of the Study:

  • To compare VFD frequency between two TLR types.
  • To correlate VFD frequency with resection size.

Main Methods:

  • Analysis of pre- and post-operative perimetry in 50 epilepsy patients undergoing TLR.
  • Comparison of classical TLR (33 patients) vs. TLR with less lateral extension (17 patients).
  • MRI-based compartmentalized resection size scoring in 34 patients.

Main Results:

  • Twenty-five patients (50%) developed VFD.

Related Experiment Videos

  • VFD occurred in 16/33 (classical TLR) and 9/17 (less lateral extension TLR) patients.
  • Higher resection scores in the anterior superior temporal gyrus were associated with VFD.

    • Conclusions:

    • No significant difference in VFD frequency between the two surgical techniques.
    • Resection extent in the anterior superior temporal gyrus is linked to VFD development.