Ear Mold Plugging
Ear Mold Plugging - Related Videos
09:10
Ear Exam
0 Views •
2023
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...
01:25
Design Example: Designing a Residential Plumbing System
0 Views •
2025
The design of residential plumbing systems requires carefully evaluating water demand, flow rates, and pressure dynamics to ensure both efficiency and reliability. The nature of water flow within pipes is defined by its Reynolds number, which classifies flow as either laminar (smooth) or turbulent. This dimensionless value depends on factors such as water velocity and pipe. Residential plumbing systems are designed to meet specific water demand and flow rate requirements based on occupancy and...
10:43
Rapid and Low-cost Prototyping of Medical Devices Using 3D Printed Molds for Liquid Injection Molding
0 Views •
Cited by 34 •
2014
We have devised a method for low-cost and rapid prototyping of liquid elastomer rubber injection molded devices by using fused deposition modeling 3D printers for mold design and a modified desiccator as a liquid injection system.
09:58
Recording Brain Activity with Ear-Electroencephalography
0 Views •
Cited by 8 •
2023
Presented here is the procedure for using the c-grid (ear-electroencephalography, sold under the name cEEGrid) for recording brain activity in and beyond the lab for extended durations. This protocol describes how to set up these arrays and how to record brain activity using them.
07:51
Acrylic Resin Molding Based Head Fixation Technique in Rodents
0 Views •
Cited by 4 •
2016
Traditional head fixation techniques have used metallic frames attached on the skull as an interface for head fixation apparatus. This protocol demonstrates a frameless, acrylic resin molding based head fixation technique for behavioral tasks in rodents.
FAQs
The fitted mold or plug reduces sound transmission through the ear canal, changing the amount of auditory information reaching the animal. Researchers can then examine whether a behavior changes when sound access is reduced, rather than assuming that hearing is unimportant. This comparison helps identify behaviors that depend on auditory cues and those maintained by other sensory information.
A consistent fit helps ensure that differences in behavior reflect altered auditory access rather than variation among animals or sessions. Investigators monitor the mold or plug to maintain the intended occlusion and to minimize discomfort or unintended sensory effects. If the fit changes, researchers may have difficulty determining whether an observed response results from hearing reduction or from the procedure itself.
Researchers can compare behavior under conditions in which auditory access is reduced while visual, chemical, or tactile information remains available. If the response persists, nonauditory cues may support that behavior; if it changes substantially, hearing may contribute to the response. The technique therefore supports controlled comparisons among sensory contributions without treating behavior as exclusively auditory or nonauditory.
A typical workflow includes fitting the mold or plug, observing the animal’s behavior under the altered auditory condition, and comparing those observations with baseline responses or a control group. Investigators monitor the fit throughout the experiment and consider possible discomfort or other sensory effects. This sequence creates a structured comparison while preserving attention to procedure-related confounds.
Researchers may use the technique when they need to test whether hearing contributes to communication, orientation, learning, or another measured behavior. It is especially useful when an experiment includes identifiable auditory cues alongside other sensory signals. Comparisons before and after plugging, or between plugged and control subjects, can reveal whether reducing auditory access changes the behavioral outcome.
Changes between baseline and plugged conditions, or between plugged and control subjects, can indicate that auditory information contributes to a behavior. Unchanged responses may suggest that other available cues can support performance, but they do not by themselves identify which nonauditory cue is responsible. Interpretation should therefore account for fit, discomfort, and unintended sensory effects.