System and method for optode and electrode positioning cap for electroencephalography, diffuse optical imaging, and functional neuroimaging
First Claim
Patent Images
1. A positioning cap comprising:
- at least one semirigid telescopic structure forming at least one loop, the semirigid telescopic structure capable of extension and compression while maintaining even spacing of devices selected from the group consisting of optodes and electrodes attached thereto;
wherein the semirigid telescopic structures comprise a plurality of telescoping subassemblies, each telescoping subassembly comprising a plurality of links and pivots with a first sub-portion between a first pivot and a second pivot of that subassembly, and a second sub-portion between the first pivot and a third pivot of that subassembly, and wherein a plurality of devices selected from the group consisting of optodes and electrodes serve as the first, second, and third pivots of the telescopic structures; and
wherein adjustment of a distance between the first and second pivot of each subassembly mechanically determines a distance between the first and third pivot of that subassembly; and
an elastomeric tensioning device configured to tighten the semirigid telescopic structure around an object.
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Abstract
An electroencephalographic electrode and optode positioning device has the form of a cap suitable for placement on a subject'"'"'s head. The cap has semirigid telescopic structures that stiffen it to provide accurate electrode and optode spacing, and stability during subject activity. The cap is intended for use in functional neuroimaging and, although its materials are compatible with fMRI, is usable without fMRI to permit study of physically as well as mentally active subjects.
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Citations
16 Claims
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1. A positioning cap comprising:
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at least one semirigid telescopic structure forming at least one loop, the semirigid telescopic structure capable of extension and compression while maintaining even spacing of devices selected from the group consisting of optodes and electrodes attached thereto; wherein the semirigid telescopic structures comprise a plurality of telescoping subassemblies, each telescoping subassembly comprising a plurality of links and pivots with a first sub-portion between a first pivot and a second pivot of that subassembly, and a second sub-portion between the first pivot and a third pivot of that subassembly, and wherein a plurality of devices selected from the group consisting of optodes and electrodes serve as the first, second, and third pivots of the telescopic structures; and
wherein adjustment of a distance between the first and second pivot of each subassembly mechanically determines a distance between the first and third pivot of that subassembly; andan elastomeric tensioning device configured to tighten the semirigid telescopic structure around an object. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of stably and repeatably positioning a plurality of devices selected from the group consisting of electrodes and optodes on a subject'"'"'s head comprising:
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providing a plurality of semirigid telescopic structures attached to an elastomeric tensioning device;
each telescoping structure comprising a plurality of links and pivots with a first sub-portion between a first pivot and a second pivot of that structure, and a second sub-portion between the first pivot and a third pivot of that structure, and wherein at least some of the plurality of devices selected from the group consisting of optodes and electrodes serve as the first, second, and third pivots of the telescopic structures; and
wherein determining a distance between the first and second pivot of each subassembly determines a distance between the first and third pivot of that structure;providing a plurality of devices selected from the group consisting of electrodes and optodes attached to the semirigid telescopic structures; and placing the elastomeric tensioning device on a subject'"'"'s head.
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Specification