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Ipsilateral neglect during intracarotid amobarbital test
1Department of Neurology, Samsung Medical Center, College of Medicine, Sung Kyun Kwan University, Seoul, Korea.
Neurology
|July 23, 1998
Summary
Ipsilateral neglect (IN), a rare condition, was observed during anesthesia recovery. This transient brain response, often following contralateral neglect (CN), occurred in 40% of patients after right hemisphere injury.
Area of Science:
- Neuroscience
- Neurology
- Cognitive Psychology
Background:
- Neglect is typically contralateral to brain injury.
- Ipsilateral neglect (IN) is a rare condition where patients with right hemisphere injury misbisect lines to the left of the midpoint.
- IN often emerges after contralateral neglect (CN) resolves.
Purpose of the Study:
- To investigate the occurrence of IN during intracarotid amobarbital infusion (Wada test).
- To characterize the temporal relationship between IN, CN, and anesthesia recovery.
Main Methods:
- Twenty right-handed subjects underwent intracarotid amobarbital infusion.
- Line bisection tasks were performed during and after anesthesia.
- Performance was monitored until baseline recovery.
Main Results:
- Transient contralateral neglect (CN) occurred in over half of the subjects (12/20).
- Ipsilateral neglect (IN) was observed in 40% of patients (8/20).
- IN predominantly occurred during the recovery phase of anesthesia and often followed initial CN.
Conclusions:
- Ipsilateral neglect (IN) can transiently occur during the recovery phase of anesthesia.
- The findings suggest a dynamic interplay between hemispheres during recovery from induced unilateral brain dysfunction.
- Further research is needed to understand the mechanisms underlying IN.