bone conduction


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conduction

 [kon-duk´shun]
conveyance of energy, as of heat, sound, or electricity.
aberrant ventricular conduction the temporary abnormal intraventricular conduction of supraventricular impulses; called also ventricular aberration.
aerial conduction (air conduction) conduction of sound waves to the organ of hearing in the inner ear through the air.
anterograde conduction
1. forward conduction of impulses through a nerve.
2. in the heart, conduction of impulses from atria to ventricles.
atrioventricular conduction (AV conduction) the conduction of atrial impulses through the atrioventricular node and the His-Purkinje system to the ventricles.
bone conduction conduction of sound waves to the inner ear through the bones of the skull.
concealed conduction conduction that is not seen on the surface electrocardiogram but may be detected by its effect on subsequent impulses; common examples are the incomplete penetration of the AV junction during atrial fibrillation, the Wenckebach type penetration during atrial flutter, and the retrograde incomplete penetration following ventricular ectopic beats.
decremental conduction a gradual decrease in the stimuli and response along a pathway of conduction; it occurs in nerve fibers with reduced membrane potentials.
retrograde conduction transmission of a cardiac impulse backward in the ventricular to atrial direction; particularly, conduction from the atrioventricular node into the atria.
saltatory conduction the rapid passage of an electric potential between the nodes of ranvier in myelinated nerve fibers, rather than along the full length of the membrane.

bone con·duc·tion

in relation to hearing, the transmission of sound to the inner ear through vibrations applied to the bones of the skull.
Synonym(s): osteophony

bone conduction

n.
The process by which sound waves are transmitted to the inner ear by the cranial bones without traveling through the air in the ear canal.

bone con·duc·tion

(bōn kŏn-dŭk'shŭn)
audiology The transmission of sound to the inner ear through vibrations applied to the bones of the skull.

bone conduction

The transmission of sound to the inner ear hearing mechanisms by way of bone rather than by the normal air, eardrum and middle ear route.

bone con·duc·tion

(bōn kŏn-dŭk'shŭn)
audiology the transmission of sound to the inner ear through vibrations applied to the bones of the skull.

conduction, conductive

conveyance of energy, as of heat, sound or electricity.

accessory tract atrioventricular conduction
permits a sinus impulse from the atria to ventricles to precede that carried by the normal atrioventricular conduction system. Arrhythmia results, the particular electrocardiographic characteristics depending on the pathway(s) involved. See also wolff-parkinson-white syndrome.
aerial conduction, air conduction
conduction of sound waves to the organ of hearing through the air.
conduction anesthesia
local anesthesia produced by the injection of an anesthetic agent close to a nerve in order to prevent transmission of nerve impulses along it.
bone conduction
conduction of sound waves to the inner ear through the bones of the skull.
conduction disorder
abnormalities in the conduction pathways of the heart.
James accessory conduction
conduction system
the system comprises the sinoatrial and atrioventricular nodes, atrioventricular bundle and Purkinje fibers.
Enlarge picture
Conduction system of the heart. By permission from Cunningham JG, Textbook of Veterinary Physiology, Saunders, 2002
conduction time
an indicator of a peripheral nerve's ability to carry an impulse; measured during electromyography. A nerve that has undergone Wallerian degeneration is unable to carry an impulse. Severe loss of myelin results in a prolonged conduction time.
References in periodicals archive ?
Air-radiated sound from bone vibration transducers and its implications for bone conduction audiometry.
Results: Statistically significant deterioration in mean bone conduction thresholds was found only with radical mastoidectomy at 4000 Htz.
We can get an idea of a normal audiologic curve, however, by looking at the bone conduction data (not the air conduction data) in Figure 5.
The thresholds obtained by air conduction (AC) and bone conduction (BC) were plotted on an audiogram sheet.
The device employs the company's piezoelectric bone conduction technology to transmit sound vibration from the skull to the auditory nervous system to enable the hearing impaired and the elderly with difficulty in hearing to effectively communicate via a cellphone.
8) Our group has previously shown that type I tympanoplasty improves conductive hearing loss between 250 and 2,000 Hz but with a simultaneous decrease in bone conduction (BC) thresholds at 4,000 Hz.
A year later, the company unveiled the Aquos Crystal, which came with bone conduction technology.
Bone conduction thresholds were measured at frequencies (500, 1000, 2000, 4000 H2) utilizing diagnostic audiometer model TA 155.
Dr Sprinzl is an expert in Samba -- the latest audio processor for the new Vibrant Soundbridge middle ear implant system and the Bonebridge bone conduction implant system.
The hat transmits sound through bone conduction, the collar sends a tiny electric shock, and a mask flashes bright lights.
Through a phenomenon known as bone conduction, those vibrations seem like a powerful bass.