This paper provides a first preliminary description of the dependencies between the stapedius muscle’s behavior and its neuronal activation with the adjustment of cochlear implants in mind. For that, stapedial electr...This paper provides a first preliminary description of the dependencies between the stapedius muscle’s behavior and its neuronal activation with the adjustment of cochlear implants in mind. For that, stapedial electromyography (EMG) data are compared with EMG data which were derived from the quadriceps femoris muscle. The rationale behind is, that the stapedius muscle is classified as a striated skeletal muscle as the quadriceps femoris muscle is. Thus, the stapedius should expose a behavior which is similar to that of peripheral skeletal muscles. The stapedial reactions were provoked with contralateral acoustic stimulation and ipsilateral electrical stimulation, respectively. The data from the quadriceps femoris muscle were evoked voluntarily. The correlation of the derived data and their stimuli have shown the following main key points: 1) The stapedius muscle behaves like a regular skeletal muscle;2) The stapedius muscle exhibits an extended range in which the muscle’s force is linear to the stimulation;3) On both sides of the linear regime, the stapedius muscle exhibits a sigmoidal behavior.展开更多
BACKGROUND Stapedial tendon ossification is a rare disease,with only a few reports.The stapedial tendon originates from the apex of the pyramidal eminence and is attached to the neck of the stapes.In stapedial tendon ...BACKGROUND Stapedial tendon ossification is a rare disease,with only a few reports.The stapedial tendon originates from the apex of the pyramidal eminence and is attached to the neck of the stapes.In stapedial tendon ossification,the stapes is fixed,causing conductive hearing loss.In most cases,complete hearing restoration is achieved by dividing the stapedial tendon after exploratory tympanotomy.CASE SUMMARY A 28-year-old woman presented to our hospital with the major complaint of bilateral hearing loss that started during childhood.Exploratory tympanotomy was performed due to suspicion of otosclerosis or middle ear anomalies.We found bilateral conductive hearing loss due to stapedial tendon ossification with a middle ear anomaly during surgery.There have been several reports of complete recovery of hearing after resection of the stapedial tendon.However,in this case,recovery of hearing was insufficient,even with the division of the stapedial tendon.In the second surgery,the stapes anomaly and footplate fixation were confirmed,and hearing was completely recovered after stapedotomy.Therefore,we report this case with a review of the relevant literature.CONCLUSION This is the first case of stapedial tendon ossification and fixation of the footplate surgically diagnosed on both sides.With surgical treatment,successful results are expected.展开更多
文摘This paper provides a first preliminary description of the dependencies between the stapedius muscle’s behavior and its neuronal activation with the adjustment of cochlear implants in mind. For that, stapedial electromyography (EMG) data are compared with EMG data which were derived from the quadriceps femoris muscle. The rationale behind is, that the stapedius muscle is classified as a striated skeletal muscle as the quadriceps femoris muscle is. Thus, the stapedius should expose a behavior which is similar to that of peripheral skeletal muscles. The stapedial reactions were provoked with contralateral acoustic stimulation and ipsilateral electrical stimulation, respectively. The data from the quadriceps femoris muscle were evoked voluntarily. The correlation of the derived data and their stimuli have shown the following main key points: 1) The stapedius muscle behaves like a regular skeletal muscle;2) The stapedius muscle exhibits an extended range in which the muscle’s force is linear to the stimulation;3) On both sides of the linear regime, the stapedius muscle exhibits a sigmoidal behavior.
文摘BACKGROUND Stapedial tendon ossification is a rare disease,with only a few reports.The stapedial tendon originates from the apex of the pyramidal eminence and is attached to the neck of the stapes.In stapedial tendon ossification,the stapes is fixed,causing conductive hearing loss.In most cases,complete hearing restoration is achieved by dividing the stapedial tendon after exploratory tympanotomy.CASE SUMMARY A 28-year-old woman presented to our hospital with the major complaint of bilateral hearing loss that started during childhood.Exploratory tympanotomy was performed due to suspicion of otosclerosis or middle ear anomalies.We found bilateral conductive hearing loss due to stapedial tendon ossification with a middle ear anomaly during surgery.There have been several reports of complete recovery of hearing after resection of the stapedial tendon.However,in this case,recovery of hearing was insufficient,even with the division of the stapedial tendon.In the second surgery,the stapes anomaly and footplate fixation were confirmed,and hearing was completely recovered after stapedotomy.Therefore,we report this case with a review of the relevant literature.CONCLUSION This is the first case of stapedial tendon ossification and fixation of the footplate surgically diagnosed on both sides.With surgical treatment,successful results are expected.
