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Ear, Inner: The essential part of the hearing organ consists of two labyrinthine compartments: the bony labyrinthine and the membranous labyrinth. The bony labyrinth is a complex of three interconnecting cavities or spaces (Cochlea; Vestibular labyrinth; and Semicircular canals) in the Temporal bone. Within the bony labyrinth lies the membranous labyrinth which is a complex of sacs and tubules (Cochlear duct; Saccule and utricle; and Semicircular ducts) forming a continuous space enclosed by Epithelium and connective tissue. These spaces are filled with Labyrinthine fluids of various compositions.
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 JoVE Behavior

Neuro-rehabilitation Approach for Sudden Sensorineural Hearing Loss

1Department of Integrative Physiology, National Institute for Physiological Sciences, 2Department of Otolaryngology, Head and Neck Surgery, Nagoya City University Graduate School of Medical Sciences and Medical School, 3Department of Otorhinolaryngology, Kansai Rosai Hospital, 4Institute for Biomagnetism and Biosignalanalysis, University of Muenster, 5Institute for Epidemiology and Social Medicine, University of Muenster, 6Sokendai Graduate University for Advanced Studies


JoVE 53264

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 Science Education: Essentials of Physical Examinations II

Ear Exam

JoVE Science Education

Source: Richard Glickman-Simon, MD, Assistant Professor, Department of Public Health and Community Medicine, Tufts University School of Medicine, MA

This video describes the examination of the ear, beginning with a review of its surface and interior anatomy (Figure 1). The cartilaginous auricle consists of the helix, antihelix, earlobe, and tragus. The mastoid process is positioned just behind the earlobe. The slightly curving auditory canal ends at the tympanic membrane, which transmits sound waves collected by the external ear to the air-filled middle ear. The Eustachian tube connects to the middle ear with the nasopharynx. Vibrations of the tympanic membrane transmit to the three connected ossicles of the middle ear (the malleus, incus, and stapes). The vibrations are transformed into electrical signals in the inner ear, and then carried to the brain by the cochlear nerve. Hearing, therefore, comprises a conductive phase that involves the external and middle ear, and a sensorineural phase that involves the inner ear and cochlear nerve. The auditory canal and the tympanic membrane are examined with the otoscope, a handheld instrument with a light source, a magnifier, and a disposable cone-shaped speculum. It is important to be familiar with the tympanic membrane landmarks (

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 Science Education: Essentials of Cognitive Psychology

Dichotic Listening

JoVE Science Education

Source: Laboratory of Jonathan Flombaum—Johns Hopkins University

It is a well-known fact that the human ability to process incoming stimuli is limited. Nonetheless, the world is complicated, and there are always many things going on at once. Selective attention is the mechanism that allows humans and other animals to control which stimuli get processed and which become ignored. Think of a cocktail party: a person couldn’t possibly attend to all of the conversations taking place at once. However, everyone has the ability to selectively listen to one conversation, leading all the rest to become unattended to and nothing more than background noise. In order to study how people do this, researchers simulate a more controlled cocktail party environment by playing sounds to participants dichotically, i.e., by playing different sounds simultaneously to each ear. This is called a dichotic listening paradigm. This experiment demonstrates standard procedures for investigating selective auditory attention with a paradigm called dichotic listening.

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 JoVE Bioengineering

From Voxels to Knowledge: A Practical Guide to the Segmentation of Complex Electron Microscopy 3D-Data

1Life Sciences Division, Lawrence Berkeley National Laboratory, 2Joint Bioenergy Institute, Physical Biosciences Division, Lawrence Berkeley National Laboratory, 3National Energy Research Scientific Computing Center, Lawrence Berkeley National Laboratory


JoVE 51673

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 JoVE Neuroscience

A Method for Systematic Electrochemical and Electrophysiological Evaluation of Neural Recording Electrodes

1School of Psychological Science, La Trobe University, 2Intelligent Polymer Research Institute, University of Wollongong, 3ARC Centre of Excellence for Electromaterials Science, 4Health Innovations Research Institute, College of Science, Engineering, and Health, RMIT University


JoVE 51084

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 JoVE Neuroscience

Functional Imaging of Auditory Cortex in Adult Cats using High-field fMRI

1Department of Physiology and Pharmacology, University of Western Ontario, 2Department of Psychology, University of Western Ontario, 3Department of Medical Biophysics, University of Western Ontario, 4Brain and Mind Institute, University of Western Ontario, 5Centre for Functional and Metabolic Mapping, Robarts Research Institute, University of Western Ontario, 6Cerebral Systems Laboratory, University of Western Ontario, 7National Centre for Audiology, University of Western Ontario


JoVE 50872

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 JoVE Biology

Direct Delivery of MIF Morpholinos Into the Zebrafish Otocyst by Injection and Electroporation Affects Inner Ear Development

1Department of Veterinary Science, University of Wisconsin, Madison, 2Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, MI, 3Present address: Department of Pulmonary Medicine, University of Michigan, Ann Arbor, MI, 4Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI


JoVE 2466

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 JoVE Neuroscience

Stereotaxic Surgery for Excitotoxic Lesion of Specific Brain Areas in the Adult Rat

1Helen Wills Neuroscience Institute, University of California Berkeley, 2Office of Laboratory Animal Care, University of California Berkeley, 3McGovern Institute for Brain Research & The Department of Brain and Cognitive Science, Massachusetts Institute of Technology, 4Integrative Biology Department, University of California Berkeley


JoVE 4079

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 JoVE Neuroscience

Non-restraining EEG Radiotelemetry: Epidural and Deep Intracerebral Stereotaxic EEG Electrode Placement

1Department of Neuropsychopharmacology, Federal Institute for Drugs and Medical Devices (Bundesinstitut für Arzneimittel und Medizinprodukte, BfArM), 2Molecular and Cellular Cognition Lab, German Center for Neurodegenerative Diseases (Deutsches Zentrum für Neurodegenerative Erkrankungen, DZNE)


JoVE 54216

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 JoVE Immunology and Infection

Cutaneous Leishmaniasis in the Dorsal Skin of Hamsters: a Useful Model for the Screening of Antileishmanial Drugs

1Program for the Study and Control of Tropical Diseases -PECET-School of Medicine, University of Antioquia, 2School of Agrarian Sciences, University of Antioquia


JoVE 3533

123458
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