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type=\u0022text\/css\u0022 rel=\u0022stylesheet\u0022 href=\u0022\/\/d282kpwvnogo5m.cloudfront.net\/sites\/default\/files\/advagg_css\/css__ce2QY63WIanKyr8eSq7eavr1XQRRmFD6ZSmwpyJi8lM__zXwFqpqmxrZOXXcd_TpBQpjuELbmIP9wBR5UuTDWAO4__YJWWMMdfCJuAFm5cUEp88OsodhO3ZA-2lzRfoBsSlk4.css\u0022 media=\u0022all\u0022 \/\u003E\n\u003Clink rel=\u0027stylesheet\u0027 type=\u0027text\/css\u0027 href=\u0027\/sites\/all\/modules\/contrib\/panels\/plugins\/layouts\/onecol\/onecol.css\u0027 \/\u003E\u003C\/head\u003E\u003Cbody\u003E\u003Cdiv class=\u0022panels-ajax-tab-panel panels-ajax-tab-panel-sageoa-tab-art\u0022\u003E\u003Cdiv class=\u0022panel-display panel-1col clearfix\u0022 \u003E\n  \u003Cdiv class=\u0022panel-panel panel-col\u0022\u003E\n    \u003Cdiv\u003E\u003Cdiv class=\u0022panel-pane pane-highwire-markup\u0022 \u003E\n  \n      \n  \n  \u003Cdiv class=\u0022pane-content\u0022\u003E\n    \u003Cdiv class=\u0022highwire-markup\u0022\u003E\u003Cdiv xmlns=\u0022http:\/\/www.w3.org\/1999\/xhtml\u0022 id=\u0022content-block-markup\u0022 xmlns:xhtml=\u0022http:\/\/www.w3.org\/1999\/xhtml\u0022\u003E\u003Cdiv class=\u0022article fulltext-view \u0022\u003E\u003Cspan class=\u0022highwire-journal-article-marker-start\u0022\u003E\u003C\/span\u003E\u003Cdiv class=\u0022section abstract\u0022 id=\u0022abstract-1\u0022\u003E\u003Ch2\u003ESummary\u003C\/h2\u003E\n            \u003Cp id=\u0022p-1\u0022\u003EThis article presents data showing that men with type 1 diabetes mellitus (T1DM) with impaired hypoglycemia awareness (HA) have different brain activation patterns than do patients with intact HA. Patients with T1DM who are unable to sense that they are hypoglycemic have less activation of brain regions involved in the stress response, autonomic activation, and emotional salience.\u003C\/p\u003E\n         \u003C\/div\u003E\u003Cul class=\u0022kwd-group\u0022\u003E\u003Cli class=\u0022kwd\u0022\u003EHyperglycemia\/Hypoglycemia\u003C\/li\u003E\u003Cli class=\u0022kwd\u0022\u003EDiabetes Mellitus Diabetes \u0026amp; Endocrinology Clinical Trials\u003C\/li\u003E\u003C\/ul\u003E\u003Cul class=\u0022kwd-group clinical-trial\u0022\u003E\u003Cli class=\u0022kwd\u0022\u003EHyperglycemia\/Hypoglycemia\u003C\/li\u003E\u003Cli class=\u0022kwd\u0022\u003EDiabetes Mellitus\u003C\/li\u003E\u003Cli class=\u0022kwd\u0022\u003EEndocrinology\u003C\/li\u003E\u003Cli class=\u0022kwd\u0022\u003EDiabetes \u0026amp; Metabolic Syndrome\u003C\/li\u003E\u003Cli class=\u0022kwd\u0022\u003EDiabetes \u0026amp; Endocrinology Clinical Trials\u003C\/li\u003E\u003C\/ul\u003E\u003Cp id=\u0022p-2\u0022\u003EPratik Choudhary, MD, King\u0027s College London, London, United Kingdom, presented data showing that men with type 1 diabetes mellitus (T1DM) with impaired hypoglycemia awareness (HA) have different brain activation patterns than do patients with intact HA. Patients with T1DM who are unable to sense that they are hypoglycemic have less activation of brain regions involved in the stress response, autonomic activation, and emotional salience.\u003C\/p\u003E\u003Cp id=\u0022p-3\u0022\u003EHypoglycemia is a huge burden for patients with T1DM. Epidemiologic and cross-sectional studies suggest that 25% to 40% of patients with T1DM have impaired HA, and the incidence increases as the disease duration increases [Choudhary P et al. \u003Cem\u003EDiabet Med\u003C\/em\u003E 2010]. Impaired HA increases the risk of severe hypoglycemia by 3 to 6 times [Choudhary P et al. \u003Cem\u003EDiabet Med\u003C\/em\u003E 2010] and is associated with counterregulatory hormonal and symptomatic responses to subsequent hypoglycemia.\u003C\/p\u003E\u003Cp id=\u0022p-4\u0022\u003EDr. Choudhary and his colleagues previously published findings on the evolution of brain responses to acute hypoglycemia in nondiabetic healthy volunteers using water positron-emission tomography (PET) imaging, showing that different regions of the brain were engaged in response to different stressors [Teh MM et al. \u003Cem\u003ENeuroimage\u003C\/em\u003E 2010]. The objective of the current study was to compare regional brain activation during experimental hypoglycemia in people with T1DM and intact or impaired HA, using radiolabeled water PET scanning. The researchers used hyperinsulinemic clamping to achieve a succession of glycemic states: euglycemia (90 mg\/dL), hypoglycemia (46.8 mg\/dL for 50 minutes), and recovery (90 mg\/dL). Scans were performed at 10-minute intervals before, during, and up to 40 minutes after hypoglycemia.\u003C\/p\u003E\u003Cp id=\u0022p-5\u0022\u003EIn total, 27 right-handed men were studied (17 men with T1DM with \u0026gt; 5 years\u0027 duration of diabetes, of whom 8 had impaired HA, and 10 healthy controls). The patients with T1DM were older and heavier than were the healthy volunteers, although those with intact and impaired HA were well matched (\u003Ca id=\u0022xref-table-wrap-1-1\u0022 class=\u0022xref-table\u0022 href=\u0022#T1\u0022\u003ETable 1\u003C\/a\u003E). A Clarke score \u2265 4 indicates impaired HA.\u003C\/p\u003E\u003Cdiv id=\u0022T1\u0022 class=\u0022table pos-float\u0022\u003E\u003Cdiv class=\u0022table-inline\u0022\u003E\u003Cdiv class=\u0022callout\u0022\u003E\u003Cspan\u003EView this table:\u003C\/span\u003E\u003Cul class=\u0022callout-links\u0022\u003E\u003Cli class=\u00220 first\u0022\u003E\u003Ca href=\u0022\/\u0022 class=\u0022table-expand-inline\u0022 data-table-url=\u0022\/highwire\/markup\/14649\/expansion?postprocessors=highwire_figures%2Chighwire_math%2Chighwire_inline_linked_media%2Chighwire_embed\u0026amp;table-expand-inline=1\u0022 html=\u00221\u0022 fragment=\u0022#\u0022 external=\u00221\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EView inline\u003C\/a\u003E\u003C\/li\u003E\u003Cli class=\u00221\u0022\u003E\u003Ca href=\u0022\/highwire\/markup\/14649\/expansion?width=1000\u0026amp;height=500\u0026amp;iframe=true\u0026amp;postprocessors=highwire_figures%2Chighwire_math%2Chighwire_inline_linked_media\u0022 class=\u0022colorbox colorbox-load table-expand-popup\u0022 rel=\u0022gallery-fragment-tables\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EView popup\u003C\/a\u003E\u003C\/li\u003E\u003Cli class=\u00222 last\u0022\u003E\u003Ca href=\u0022\/highwire\/powerpoint\/14649\u0022 class=\u0022highwire-figure-link highwire-figure-link-ppt\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EDownload powerpoint\u003C\/a\u003E\u003C\/li\u003E\u003C\/ul\u003E\u003C\/div\u003E\u003C\/div\u003E\u003Cdiv class=\u0022table-caption\u0022\u003E\u003Cspan class=\u0022table-label\u0022\u003ETable 1.\u003C\/span\u003E \n            \u003Cp id=\u0022p-6\u0022 class=\u0022first-child\u0022\u003EBaseline Characteristics in Study Subjects\u003C\/p\u003E\n         \u003Cdiv class=\u0022sb-div caption-clear\u0022\u003E\u003C\/div\u003E\u003C\/div\u003E\u003C\/div\u003E\u003Cp id=\u0022p-8\u0022\u003EAmong T1DM subjects with impaired HA compared with subjects with intact HA or healthy volunteers, acute hypoglycemia resulted in deactivation or lack of activation in brain regions involved in stress responses, autonomic activation, and emotional salience of stressful stimuli. Impaired HA resulted in activation or a lack of deactivation in areas of the brain involved in interoception, executive function, and reward and hedonic perception and in the resting state network. After recovery from hypoglycemia, there was persistent activation or lack of deactivation in reward networks in patients with impaired HA compared to those with intact HA. The investigators concluded that emotional and motivational responses to hypoglycemia, including the emotional memory of each event, are likely barriers to hypoglycemia avoidance and are potential targets for restoring HA.\u003C\/p\u003E\u003Cul class=\u0022copyright-statement\u0022\u003E\u003Cli class=\u0022fn\u0022 id=\u0022copyright-statement-1\u0022\u003E\u00a9 2014 MD Conference Express\u00ae\u003C\/li\u003E\u003C\/ul\u003E\u003Cspan class=\u0022highwire-journal-article-marker-end\u0022\u003E\u003C\/span\u003E\u003C\/div\u003E\u003Cspan id=\u0022related-urls\u0022\u003E\u003C\/span\u003E\u003C\/div\u003E\u003Ca href=\u0022http:\/\/mdc.sagepub.com\/content\/14\/19\/15.abstract\u0022 class=\u0022hw-link hw-link-article-abstract\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EView Summary\u003C\/a\u003E\u003C\/div\u003E  \u003C\/div\u003E\n\n  \n  \u003C\/div\u003E\n\u003C\/div\u003E\n  \u003C\/div\u003E\n\u003C\/div\u003E\n\u003C\/div\u003E\u003Cscript type=\u0022text\/javascript\u0022 src=\u0022http:\/\/mdc.sagepub.com\/sites\/all\/modules\/highwire\/highwire\/plugins\/highwire_markup_process\/js\/highwire_openurl.js?nzp2u2\u0022\u003E\u003C\/script\u003E\n\u003Cscript type=\u0022text\/javascript\u0022 src=\u0022http:\/\/mdc.sagepub.com\/sites\/all\/modules\/highwire\/highwire\/plugins\/highwire_markup_process\/js\/highwire_tables.js?nzp2u2\u0022\u003E\u003C\/script\u003E\n\u003C\/body\u003E\u003C\/html\u003E"}