JIT: Effect of Pain on DT in TMD

Inclusion Criteria:

* Participants in this study must be 21 years to 65 years of age and provide a driver's license or other state-issued ID.
* Participants must also be sufficiently fluent in English to provide informed consent and understand questionnaires and instructions for laboratory procedures.
* Participants in this study must report regular drinking exceeding NIAAA guidelines for (≥ 2 (men) or ≥ 1 (women) drinks per day on average) over the past six months, as well as drinking on ≥ 2 days/week.
* Meet Diagnostic Criteria for Temporomandibular Disorders (DC/TMD) for myalgia (masticatory muscle pain), arthralgia (TMJ pain), or a combination (Schiffman et al., 2014) (TMD group only).
* Own a smartphone with internet access.
* Use of prescription medications will be allowed, provided they do not contraindicate alcohol use.

Exclusion Criteria:

* Use of opioid analgesics within the past month;
* Current major depression;
* History of any psychotic disorder;
* Under-controlled hypertension or diabetes (as reflected by self-report); neurological disease (e.g., multiple sclerosis, epilepsy, amyotrophic lateral sclerosis, Parkinson's disease);
* Serious medical illness (e.g., hepatitis, HIV/AIDS);
* Impaired cognitive function;
* History of substance use disorder (including nicotine/tobacco);
* Alcohol naïve
* Alcohol use disorder, or currently attempting to quit or cut down on using alcohol
* Positive pregnancy test
* Breastfeeding or intending to become pregnant
* Loss of sensation in the lower leg
* Inability to complete study tasks due to weakness, immobilization, or loss of limbs
* Chronic pain (Control group only)
* A urine-based drug screen for tetrahydrocannabinol, cocaine, benzodiazepines, morphine, and methamphetamine (Innovacon, Inc., San Diego, CA) will be performed. Participants testing positive for any substance will be discontinued.
* Medications that contraindicate alcohol use