Concurrent tonotopic processing streams in auditory cortex.

Concurrent tonotopic processing streams in auditory cortex. Research Abstract Details 

Research Abstract Table of Contents

Jump to the:

Concurrent tonotopic processing streams in auditory cortex. Abstract Text:

The basis for multiple representations of equivalent frequency ranges in auditory cortex was studied with physiological and anatomical methods. Our goal was to trace the convergence of thalamic, commissural, and corticocortical information upon two tonotopic fields in the cat, the primary auditory cortex (AI) and the anterior auditory field (AAF). Both fields are among the first cortical levels of processing. After neurophysiological mapping of characteristic frequency, we injected different retrograde tracers at separate, frequency-matched loci in AI and AAF. We found differences in their projections that support the notion of largely segregated parallel processing streams in the auditory thalamus and cerebral cortex. In each field, ipsilateral cortical input amounts to approximately 70% of the number of cells projecting to an isofrequency domain, while commissural and thalamic sources are each approximately 15%. Labeled thalamic and cortical neurons were concentrated in tonotopically predicted regions and in smaller loci far from their spectrally predicted positions. The few double-labeled thalamic neurons (<2%) are consistent with the hypothesis that information to AI and AAF travels along independent processing streams despite widespread regional overlap of thalamic input sources. Double labeling is also sparse in both the corticocortical and commissural systems ( approximately 1%), confirming their independence. The segregation of frequency-specific channels within thalamic and cortical systems is consistent with a model of parallel processing in auditory cortex. The global convergence of cells outside the targeted frequency domain in AI and AAF could contribute to context-dependent processing and to intracortical plasticity and reorganization.

Concurrent tonotopic processing streams in auditory cortex. Publishing Authors By Initials

For similar abstracts research abstracts see: abstracts research

PUBMED ID PMID:

MEDLINE DATE:

Concurrent tonotopic processing streams in auditory cortex. Journal Published:

PUBLICATION TYPE: Research Support, U.S. Gov't,

Journal: Cerebral cortex (New York, N.Y. : 1991)

VOLUME: 14

Page Numbers: 441-51

Journal Abbreviation: Cereb. Cortex

ISSN: 1047-3211

DAY: 19

MONTH: Apr

YEAR: 2004

Concurrent tonotopic processing streams in auditory cortex. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 9110718

Concurrent tonotopic processing streams in auditory cortex. Keywords Mesh Terms:

KEYWORDS: Thalamus

MESH TERMS: physiology

Chemical & Substance for Abstract: Concurrent tonotopic processing streams in auditory cortex. Information

Substance Name:

Registry Number:

Grant and Affiliation Information for Concurrent tonotopic processing streams in auditory cortex.

AFFILIATION: Division of Neurobiology, Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720-3200, USA. chazwell@uclink4.berkeley.edu

Country: United States

AGENCY: United States NIDCD

GRANT: R01 DC2319-24

ACRONYM: DC

MEDLINETA: Cereb Cortex

REFSOURCE:

DATABASENAME:

ACCESSION NUMBER:

Number Hits: 0

Concurrent tonotopic processing streams in auditory cortex Related Publications

• A framework for interactive examination of automatic segmented tumors in a virtual environment.
• A simple approach to quality assurance in a complex ambulatory care setting.
• Advances in adjuvant endocrine therapy for postmenopausal women.
• Age of menopause among women who remain premenopausal following treatment for early breast cancer: long-term results from International Breast Cancer Study Group Trials V and VI.
• Auditory cortex mapmaking: principles, projections, and plasticity.
• Branched projections in the auditory thalamocortical and corticocortical systems.
• Commoner skin diseases of the external genitalia.
• Concurrent tonotopic processing streams in auditory cortex.
• Connections of cat auditory cortex: I. Thalamocortical system.
• Connections of cat auditory cortex: II. Commissural system.
• Connections of cat auditory cortex: III. Corticocortical system.
• Cutaneous leishmaniasis; report of a case and summary of the newer concepts.
• Drospirenone/ethinyl estradiol.
• Elastic fibers in unusual dermatoses.
• Follow-up care of patients with breast cancer.
• Herpes zoster and malignancy.
• Heterogeneity of breast cancer and implications of adjuvant chemotherapy.
• How does infiltration behavior modify the composition of ambient PM2.5 in indoor spaces? An analysis of RIOPA data.
• Impact of a mixed strength and endurance exercise intervention on insulin levels in breast cancer survivors.
• Long-term psychosocial adjustment of older vs younger survivors of breast and endometrial cancer.
• Optimizing endocrine therapy for estrogen receptor-positive breast cancer: treating the right patients for the right length of time.
• Phase II trial of lapatinib for brain metastases in patients with human epidermal growth factor receptor 2-positive breast cancer.
• Preoperative therapy in invasive breast cancer: pathologic assessment and systemic therapy issues in operable disease.
• Preoperative therapy in invasive breast cancer: reviewing the state of the science and exploring new research directions.
• Racial Differences in Clinical Outcomes From Metastatic Breast Cancer: A Pooled Analysis of CALGB 9342 and 9840--Cancer and Leukemia Group B.
• Risk perceptions and psychosocial outcomes of women with ductal carcinoma in situ: longitudinal results from a cohort study.
• Sarcoidosis mimicking metastatic breast cancer.
• The pharmacologic management of premenstrual dysphoric disorder.
• Uterine inversion associated with bicornuate uterus.
• Vascular compliance in the cardiometabolic syndrome.