The two conductive spacers in {TAIL ~ each bit} cell are linked by a transistor which is controlled by {HEAD ~ a write word line} 
The two conductive spacers in { TAIL ~ each bit } cell are linked by a transistor which is controlled by { HEAD ~ a write word line }
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD