Functional Neuroanatomy of Emotion Perception, Recognition, Learning, and Memory

NCT00458432 | Completed

• 2 other identifiers: 07012707-M-0127
• Study Type: observational
• Target: 180
• Locations: 1 country
• Sites: 1

Brief Summary

This study uses magnetic resonance imaging (MRI) to explore the areas of the brain involved in different types of mental processes, in particular, the brain regions involved in perception, recognition, learning, and memory. MRI uses a magnetic field and radio waves to produce images of body tissues and organs. In this study it is also used to measure blood flow in different regions of the brain while the subject is presented auditory or visual stimuli. The subject lies on a table that can slide in and out of the scanner (a narrow cylinder), wearing earplugs to muffle loud noises that occur during the scanning process. Subjects are in the scanner no more than 2 hours. Healthy, right-handed normal volunteers between 20 and 40 years of age who have at least a high school education may be eligible for this study. While undergoing MRI, participants are presented visual stimuli (pictures or geometric shapes on a projection screen) or auditory stimuli (tones played through a set of headphones). Unpleasant stimuli such as loud noise, electric shocks, heat, or tactile stimuli are administered occasionally. The intensity of these stimuli is similar to those experienced in practice sessions before the scanning. Participants receive between 30 and 60 visual or auditory stimuli during the scanning session, and each stimulus lasts about 1 second. In some studies participants are asked to move a joystick that controls a rating bar presented on a projection screen to indicate when they expect to receive these stimuli and how sure they are that they will occur. Heart rate, respiration rate, and sweat gland activity are monitored during the MRI sessions, using electrodes placed on the fingers to measure heart rate and sweat gland activity and a sensor strapped around the chest to measure respiration. Subjects are in the scanner no more than 2 hours. Following the experiment, subjects may be asked questions about their experiences during the study.

Conditions

Healthy

Keywords

fMRI; Pavlovian Conditioning; Functional Activity; Brain; Fear; Healthy Volunteer; HV

Eligibility Criteria

• Age: 20 Years - 40 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

• Normal right-handed volunteers with at least a high school education, age 20 to 40 years, will be recruited to participate in this study.

You may not qualify if:

• Subjects will be excluded if they have evidence of or a history of learning disability, psychiatric condition, head trauma, seizures or other neurological condition, alcoholism or substance abuse, hypertension, or cardiovascular disease. We will also exclude subjects with vision and/or hearing problems severe enough to interfere with testing. Lab work will be limited to a urine pregnancy test for females. Females with a positive pregnancy test will be excluded from neuroimaging studies. All subjects will be questioned prior to MRI scanning for possible occupational exposure to metal slivers or shavings, which may have become accidentally lodged in the tissues of the head or neck. Those whose history is suggestive of such a problem will be excluded. Subjects with surgical clips or shrapnel in or near the brain or blood vessels, subjects with cochlear implants, subjects with any metallic body in the eye or CNS, and subjects with any form of implant wire or metal device which may concentrate radiofrequency fields will be excluded because of possible risks during MRI scanning.

Sponsors & Collaborators

• National Institute of Mental Health (NIMH): lead

Study Sites (1)

National Institutes of Health Clinical Center, 9000 Rockville Pike

Bethesda, Maryland, 20892, United States

Location

Related Publications (3)

• Baumgartner U, Magerl W, Klein T, Hopf HC, Treede RD. Neurogenic hyperalgesia versus painful hypoalgesia: two distinct mechanisms of neuropathic pain. Pain. 2002 Mar;96(1-2):141-51. doi: 10.1016/s0304-3959(01)00438-9.

  PMID: 11932070 BACKGROUND

• Bechara A, Tranel D, Damasio H, Adolphs R, Rockland C, Damasio AR. Double dissociation of conditioning and declarative knowledge relative to the amygdala and hippocampus in humans. Science. 1995 Aug 25;269(5227):1115-8. doi: 10.1126/science.7652558.

  PMID: 7652558 BACKGROUND

• Andrew D, Greenspan JD. Peripheral coding of tonic mechanical cutaneous pain: comparison of nociceptor activity in rat and human psychophysics. J Neurophysiol. 1999 Nov;82(5):2641-8. doi: 10.1152/jn.1999.82.5.2641.

  PMID: 10561433 BACKGROUND

Study Design

• Study Type: observational
• Time Perspective: PROSPECTIVE
• Sponsor Type: NIH

Study Record Dates

• First Submitted: April 7, 2007
• First Posted: April 10, 2007
• Study Start: April 5, 2007
• Primary Completion: August 31, 2009
• Study Completion: August 31, 2009
• Last Updated: July 2, 2017

Record last verified: 2009-06-08

Locations

US (1)