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CIA

This CIA document from the MKUltra collection discusses the use of flickering lights in interrogations and research into sensory stimulation, noting that certain frequencies of light stimulation can induce seizures in a small percentage of subjects, allowing for the establishment of an "epileptic threshold.

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I lfovo:ubor lC, 1:~55 .. .Jt.,;_,y Donr l::::.:lt . \ As I i:ol<! you I would, I 1m.:s c!o;'i':l in r.":1shinr;ton for !:C~crn.l c.n: Jneotin~s, · tor t!tnt rca.:>Oll ~s urAblo to r.ot to z:.nm-;cr :tour qucstion!l bcforo t!rls. l-"irs~, o.:o concorns t.~o t:eo ot tlic;:crin:; · 11::;'ht3 in intorrocn~.;ions 'i~c inqi.rl.ror cc.:rs t.:,... ..t it is •:evident thD.-t this =-~·::r~!loJ i:; u:::'3d to co:-..!'u::o or cx.~a.t:.;~'t. ~hE) ::1an:" &ctua.ll~.. 1 \1it!1in rccon1: y'3ars 'thor·~ ~U\3 boon c. co:.1:oiclcr::.bla in~crc::t r.:tonc n!3uro-p!1J'3iolo;;l:>~s, ~~urolo~i:>ts, !in-l p!::,·c~!ir.rt:-ir.ts, C.:l;! tho phqno::~cnon o1"' incrensod <!T.Ci 'tc.bilH;:; "of the ~otor cortex !'ollc-;11:1=; or son:;ory nti~'.llction en:! i~c-ic-~n"..~l.l to thi:; ~h'l u~a s~. . r:.:.!.lo~~eo!lic licht sti::rulul..ion '-:~:; cc-.riGcc b:r i!-onri Gas~of.lut, r. l"rc~ch i :wcntir;ntor Tiho fir~t r:;ort.oC. en th~ eo~~i!l!lticn cr' tl1is -::t?!' ci' ?ho·tl~ stio.u- l " . " . " . 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Ey Usin~ ~his ~~~n~~cnon the epileptic thrc~nol~ cnn -be ost:lblishod. ~h~re n·re o. fo-:r persons T:ho e~n hnvo their cortex dri ~on by .. or cortc.in !'rcC!U·lncios li -;ht stinul~tion end e.::::ochtoc! -r:!.th thi3 'thoro o.rc ::oo":'lc ?fJCulir.r ~ir.::cei!lt.;d ~=~pori'3:!co:;. 0!1 occa::ion tto hn.vo lmd such per:: This page displays stylized text overlaying a dark background with a depiction of a vault door on the left. The large title "THE BLACK VAULT" is prominent, followed by explanatory text detailing that the document originates from an online database of declassified government documents, specifically the MKULTRA/Mind Control Collection. The text also mentions the Central Intelligence Agency (CIA) and provides a URL for accessing the collection. No photographs, handwritten annotations, stamps, forms, diagrams, tables, or redactions are visible. p~:rccnUl.co ot O?ilcp~icc. Ey Usin~ ~his ~~~n~~cnon the epileptic thrc~nol~ cnn -be ost:lblishod. ~h~re n·re o. fo-:r persons T:ho e~n hnvo their cortex dri ~on by .. or cortc.in !'rcC!U·lncios li -;ht stinul~tion end e.::::ochtoc! -r:!.th thi3 'thoro o.rc ::oo":'lc ?fJCulir.r ~ir.::cei!lt.;d ~=~pori'3:!co:;. 0!1 occa::ion tto hn.vo lmd such per:: on~ uc~:!!:-: .~!lllu~.i:::..t.~. All ct th.r.l h!lvo scno ~~~suro or illusio~s ~s ~ co~~c~u~~co or thi~. -... . • .. . It is• evident nl:o timt H• :::ht is not tho only :;cn::QtI- :1.' . sti~ul\13 tf~ich cnn p1·oc~uco t~!.!l cf:"'::ct. :ionic ·ncti. ..-o.tio!". ho.:; al-so -,1>-~cn re~,~r'.:.e:1 ::a (zooo Arollo.r.oo ot· o.l) i::l Clin. ::ouro?!lysiol. l£i50, 2:~l:i-2l7. ~horo is rc.t.~or exton:; 1·.-o 11 tora.turo on tho :~ubjoct which co.!l bo cotto:l tot;othcr. tor "JOU if you Will~\• .. . .. . . . · .· .. . .. . ; : ... -·. · • - .r - • You- rm:ttio"l yo'.lr ~!.11 b·n:.~:::s t,, ~~·,lu u:: 'Outllin eort:.nin nnc~i- cntln~:; nrl'l •lr:1:.:~ ,.;.,r., t~l.,:t Hot ord1;~r.::-il~r nve.ilnulu,· tl:trl I ~tllillcl / no-.r. H~n to n:~!c ciJout ~!1:1 ~·~:;zibility o:· !~•ttt.in;; n C-1-:· t.•q-.;;..!.!.L.o.!l.._ V ·l·r-:cr·i,. ::r:!..;.!.. I :1 ... ~ :::o·lLil),l!~ti l:O yo~ cur ?ln:x~cJ. "tror·~ on th•J - dctoction of !_i; 1.:: V:\rlou:. ':"'ll~ lcl1 in t.:lo· ccntrnl '!!or..-ou!l :;:r;tc~ b' 1 u t. l " . ll :: i :t;; , .. . SC ...... or:- - · , ~ ._ - . . . . .. . . . . . - . ' .. - . ~ . > . , . , . : .. . . , . - ;.: . ., . ,;~ . ·;; . ___ , . ~ . J " . t OC: . ' ~"l . l ql!;~ o~I ' .... ~ ~ 1 - : i"" .. • " l u nr::::sc\3 under \lltrn.IJ.~.?-t...l!.:~!·t~..!. A:: you cr.:'1 :<??rccif'.to, -;::~·tJ ucnlfi~; ia oxtr-l:tcly :::::lll :,uc.:;t.liic~ C..:"l~ ror t."-lnt r~r.!:o:"l rool "'.;hnt it '\rould be t1ell to ba r:oro ... c~Ur!l.t~ :t!l >t'-,ll c.c to (!a"'.;cc't c:"\:!.11 ':t::>.ntitio!: by tho u:oo or fl rat'loauto;.ru,?h t~~hniquu t;l!l.t i:s h:lviu'c tho brnin :;licos ta.ko their o~··"!l ;·!1oto~raph:; on fil.r:t .thl,) m:;:·oiiuro uoi::;;; ncccr.~pliahod b,y tho pros,r.co or rndioactiv~ caruo~. , - I ~111 b~ Glcd to.spoll out th~ !'orccoi~h L, ~oro dotail if it would bo help:Ul. Th~~~ too, s~~~t~o c~o ~o ~lkou cbout t~o po~.>:::i bilit :• or our The document is a typed letter. Handwritten annotations are present in the top right corner, with a circled "35-7" and an illegible inscription above it. The date "November 16, 1955" is typed at the top. There is a handwritten salutation "Dear" followed by an illegible name or initial. Two small checkmarks are handwritten in the left margin near the middle of the page. There is no other visual content such as photographs, stamps, forms, diagrams, or tables observed on this page. The document appears to be a standard correspondence with minimal non-textual markings. tho brnin :;licos ta.ko their o~··"!l ;·!1oto~raph:; on fil.r:t .thl,) m:;:·oiiuro uoi::;;; ncccr.~pliahod b,y tho pros,r.co or rndioactiv~ caruo~. , - I ~111 b~ Glcd to.spoll out th~ !'orccoi~h L, ~oro dotail if it would bo help:Ul. Th~~~ too, s~~~t~o c~o ~o ~lkou cbout t~o po~.>:::i bilit :• or our ::tt:Uyin:; !.::.t;'!!.!. t.'l _;!n.:r~:lcl·i;.:.r....i9.~i~j.j;y" 'pro-.ic!c..i co:1o o!' t!l'!l suoztr.r.co coulf.. bo !'1!:-t:o n'milnolc. .:o h:lvo sot up n ?rot;rA.-, ""lt\orou:,r T-O car. lo?~:. i~t.o !:h~_riK~.9.r.:::~!::_~sp. you so:1t .E~~l~2:.!- tcr.rnr~.!.~~~;:; ..u o;~ thQ _r o.::.r-=>::~ill.o_f!:9to~ •- · I With k~dest rct~rds. Si.'lcoro ly, . tit~Y~~!:;r~z; . . . · . ~··.• •. ~~~i"~~r.r.~-.;~.,~;~.:Jft'tf~-.(;.-..~~~. .. ~~~"·. .. ·w.~. ....· ~'1~~,.;_.Gol;q:.,,._~~.._.~ .......... r. . :"~~ c) ;.vc-.-l.....:..., ,..,_ .... ... 'L.t~ ~ ...-,~~-~~~~~(::....~~~'tltf•~~~~ ... -.~~~;,.>e~;';;;.·~~"L~........,..;...,..;;;;;.,ilf I ~ A..1~-(~ [-~(it.. It~,·~~ \ .. .· . .. .. - • .. .... ··. - This page contains a typewritten letter dated November 16, 1956. There are several handwritten annotations, including a checkmark in the margin next to a paragraph, and a note at the bottom listing "Amanita phalloides-" followed by what appears to be a phrase in German. Redactions are present throughout the document, obscuring parts of the text. There are also some faint ink marks and smudges. No photographs, stamps, forms, diagrams, or structured data are visible.

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