An electrode array and deployment assembly, including: an access cannula consisting of a structural member formed from material that is insertable in living tissue, the member shaped to define a lumen having a major diameter and a distal end, the lumen open at the distal end; and an electrode array (28, 290) including: a frame (32, 350) formed from flexible material that can be folded or rolled and that, when able to expand from a folded or rolled state, returns to an unfolded or unrolled state, wherein said frame (32, 350) has a width greater than the major diameter of the access cannula lumen and said frame (32, 350) is formed to define at least two tabs (55, 318) that are part of the frame (32, 350), with each said tab (55, 318) separated from surrounding sections (53, 320) of the frame; and at least two electrodes (36, 292) disposed on the frame (32, 350), with one electrode (36, 292) disposed on each said tab (55, 318); wherein the frame (32, 350) is further formed to have at least two spaced apart bridges (302, 304, 306), each said bridge having at least one said tab (55, 318) that extends outwardly from the bridge, wherein at least one tab of at least one bridge extends toward a second bridge, said tab being spaced away and separated from the second bridge; and wherein at least one beam (53, 320) extends between the first said bridge (302, 304) and the second said bridge (304, 306) so as to connect said bridges, said at least one beam being bendable so as to bend when the first said bridge is folded over the second bridge, and said beam (53, 320) being spaced apart from said tabs (55, 318); wherein, when the frame (32, 350) is disposed in the access cannula lumen, the frame (32, 350) is folded or bent so as to cause the bridges (302, 304, 306) to overlap and so that said at least one tab (55, 318), including said electrodes (36, 292) thereon, is not folded or bent to the extent said at least one beam (53, 320) is folded or bent, characterized in that said frame (32, 350) is formed to define a number of slots, the slots being located adjacent said tabs (55, 318) so as to separate said tabs (55, 318) from surrounding sections (53, 320) of said frame (32, 350). an access cannula consisting of a structural member formed from material that is insertable in living tissue, the member shaped to define a lumen having a major diameter and a distal end, the lumen open at the distal end; and an electrode array (28, 290) including: a frame (32, 350) formed from flexible material that can be folded or rolled and that, when able to expand from a folded or rolled state, returns to an unfolded or unrolled state, wherein said frame (32, 350) has a width greater than the major diameter of the access cannula lumen and said frame (32, 350) is formed to define at least two tabs (55, 318) that are part of the frame (32, 350), with each said tab (55, 318) separated from surrounding sections (53, 320) of the frame; and at least two electrodes (36, 292) disposed on the frame (32, 350), with one electrode (36, 292) disposed on each said tab (55, 318); a frame (32, 350) formed from flexible material that can be folded or rolled and that, when able to expand from a folded or rolled state, returns to an unfolded or unrolled state, wherein said frame (32, 350) has a width greater than the major diameter of the access cannula lumen and said frame (32, 350) is formed to define at least two tabs (55, 318) that are part of the frame (32, 350), with each said tab (55, 318) separated from surrounding sections (53, 320) of the frame; and at least two electrodes (36, 292) disposed on the frame (32, 350), with one electrode (36, 292) disposed on each said tab (55, 318); wherein the frame (32, 350) is further formed to have at least two spaced apart bridges (302, 304, 306), each said bridge having at least one said tab (55, 318) that extends outwardly from the bridge, wherein at least one tab of at least one bridge extends toward a second bridge, said tab being spaced away and separated from the second bridge; and wherein at least one beam (53, 320) extends between the first said bridge (302, 304) and the second said bridge (304, 306) so as to connect said bridges, said at least one beam being bendable so as to bend when the first said bridge is folded over the second bridge, and said beam (53, 320) being spaced apart from said tabs (55, 318); wherein, when the frame (32, 350) is disposed in the access cannula lumen, the frame (32, 350) is folded or bent so as to cause the bridges (302, 304, 306) to overlap and so that said at least one tab (55, 318), including said electrodes (36, 292) thereon, is not folded or bent to the extent said at least one beam (53, 320) is folded or bent, characterized in that said frame (32, 350) is formed to define a number of slots, the slots being located adjacent said tabs (55, 318) so as to separate said tabs (55, 318) from surrounding sections (53, 320) of said frame (32, 350).