External Auditory Structure
Pinna The external ear comprises of pinna and external auditory canal. The elastic fibrocartilage forms the body of the pinna and is covered by skin which is attached loosely on its medial surface. This cartilage is avascular and derives its nutrition from the perichondrium. A unique pattern on the lateral surface of the pinna makes it characteristic for each individual and comprises of helix, antihelix, triangular fossa, scaphoid fossa, concha, tragus, antitragus, intertragic notch and lobule. The narrow gap between the anterior crux of helix and tragus is deficient of cartilage and comprises of dense fibrous tissue, known as incisura terminalis. This serves as a site for endaural incision to access the temporal bone. (21,22) External Auditory …show more content…
It is the only membrane in the body that closes an orifice and remains intact. It is slightly oval shaped, emulates an irregular cone with its apex at the umbo and is obliquely placed. It forms the lateral wall of the tympanic cavity and subtends an angle of about 55° with the inferior wall of the external auditory canal, measuring 9-10 mm (horizontal dimension) x 8-9 mm (vertical dimension).(23) The thickened circumference forms the fibrocartilaginous tympanic annulus anchored in the tympanic sulcus that is deficient superiorly forming the notch of Rivinus. As the tympanomeatal flap is elevated, the annulus is taken along with the TM, and commences just above the notch of Rivinus superiorly. The division of TM into two unequal parts is carried out by the anterior and posterior malleolar folds into the triangular and smaller pars flaccida, and inferiorly pars tensa which is concave towards the …show more content…
This occurs by two different mechanisms. Firstly, the diminished TM surface area on which sound pressure is exerted results in dampened ossicular chain excursion. As perforation size enlarges, the loss of surface area is also greater. Hearing loss is greatest at lower frequencies and decreases as frequency increases. Additionally, the influence of site of perforation on degree of hearing loss is noted as more severe hearing losses are produced by posterior
Cattle Primate Observation Report
308 Words | 2 PagesIt was also determined that prehensile tailed platyrrhines had more pronounced and convex articular surface curvatures. Greater contour curvatures on intervertebral articular surfaces are associated with an increased range of flexibility and mobility of the caudal vertebrae, benefiting prehensile primates that use their tails in a variety of complex movements. Hence, through analyses of the morphology of caudal vertebrae, specifically their articular surface area and curvature, it was concluded prehensile and non-prehensile tails could be distinguished according to these structural features. Both of these characteristics relate to effective use of the tail during locomotion. This article is useful towards my GEM as it describes differences in bone structure of the tails of prehensile and non-prehensile primates, and explains the reasons that certain variations confer advantages to prehensile tail
Fish Chapter 14 Summary
926 Words | 4 PagesChapter 5: 1: Both the trigeminal and facial cranial nerves are the most complicated because the start from the brain and split into different parts of the body. 2: The structures are the ears, larynx, throat and jaws. 3: The Hox genes are like blue prints for development for embryos. They are important because without them the embryo wouldn’t know how to develop. 4: Amphioxus is a small invertebrate, yet shares many characteristics with vertebrates.
Through The Deaf Eyes Analysis
354 Words | 2 PagesThrough the deaf eyes is a film about what is like to be deaf; it also tells us about the history, as well as challenges deaf culture has faced. It speaks about Thomas Hopkins Gallaudet and Laurent Clerc the creators of the first school for the deaf, also deaf clubs, and people today who have changed perspectives of the deaf community. Gallaudet University was the first environment where deaf community can come together and begin their history and culture teaching deaf children how to speak would benefit them more in the future; however that was not the case, and many thought it was a waste out time as they got older. They feel that they should have focused on sign language, so that they can learn more instead of spending years on learn to
Audiological Evaluation Paper
449 Words | 2 PagesEVAS, he experiences irregular shifts in his hearing ability so monitoring his audiogram is vital for effective communication, so one service that needs to be added is regular audiological evaluations when a change in hearing is suspected or at least monthly. The acoustics of classrooms and other learning environments can significantly alter how Sam has access to spoken language. So the audiological evaluations need to include at minimum an aided audiogram and evaluation of personal amplification (hearing aides) and educational modification (FM unit). My preference for this type of evaluation is for an ASHA certified Educational Audiologist. This should be completed whenever there is a documented change in hearing or any changes in seating
Stimulated Hearing Loss Assignment Analysis
1111 Words | 5 PagesStimulated Hearing Loss Assignment For my stimulated hearing loss assignment I went to four different locations, which included ODU’s Café, CVS, the movie theater, and my apartment. I attendant these places with two of my friends who were also wearing earplugs. While completing this assignment I used HEAROS ear plugs, which had a NRR of 32.
Hearing Loss Simulation Analysis
728 Words | 3 PagesHearing loss simulation As a student at Santa Ana College, I have had the privilege to embark on a wonderful exercise where I can experience hearing loss for a short period. In this particular task, I started with the preparations as first to insert one earplug in each ear for the duration of thirty minutes. Also as intended for this simulation, I am bound to insert both earplugs in each ear for the duration of thirty minutes. As a participant of this project, I will endure this for a total of an hour and thirty minutes. I feel that this will be challenging for me because I love to listen to music and talk on the phone.
Comprehensive Auditory Essay
396 Words | 2 PagesOver 300,000 people around the world have received cochlear implants (NIDCD, 2014). Research showing the importance of early intervention for children with hearing loss has led to children receiving the implants (CIs) earlier and earlier. However, by the time children are approved for the implant, have the surgery, and have the implant programmed, they can lose up to two years of hearing experience. This lost time puts children behind their normal-hearing peers in speech, language, and social development. After so much lost time, children need extra support to catch up to their hearing peers.
Cochlear Argument Essay
690 Words | 3 PagesCochlear, a global leader in implant and processor technology, which manufactures products that can help restore hearing. Facts have shown that over 180,000 people with hearing loss benefit from the miracle of sound of its product. These great achievements are inextricably linked with the positive work environment (Dul & Ceylan, 2014).Cochlear believes that energetic workplace would bring tangible rewards; Organizations that invest in their employees and establish a well-organized work environment is likely to see the payoff in productivity. Speaking freely is recognized in Cochlear as it will hear the voice from every staff, which has the huge impact in business morale. The supportive team, good management and overall ambience with the mission of Cochlear made the work environment with high efficiency.
Being Deaf Informative Speech
915 Words | 4 PagesIn early childhood, kids can get this by a severe head injury or different infections. People over 65 make up about 1/3 of everyone with hearing loss. About 50% of cases are preventable. There is no one specific group of people that have a greater chance of becoming deaf than others. The biggest thing is to
Personal Narrative Hearing Loss
797 Words | 4 PagesTo deal with the excess wax build up from various ear infections I’ve had tubes put in and taken out too many times to count. After twenty ear related surgeries,one of which being a skin graft to reconstruct my left eardrum after it didn’t heal on its own once the tubes were removed, I gave up counting. Due to the reconstruction of the eardrum and the large amount of scarring from tubes, I now have permanent conductive hearing loss on top of the temporary conductive hearing loss due to occasional excess wax during bad infections and the permanent and continuous sensorineural hearing loss. For the vast majority of my life local audiologist as well as specialists at the Mass Eye and Ear Infirmary were baffled as to why my outer hair cells just kept dying.
Mastoiditis Research Paper
411 Words | 2 Pages• Cultures of ear drainage. • X-rays. • CT scan. • MRI.
Essay On Psychoacoustics
715 Words | 3 PagesSo all in all, psychoacoustics is an insanely complex topic. I’ve attempted to simplify the complexity that is psychoacoustics, and feel as if I’ve given enough information above to allow someone to have a basic understanding about the discussed topics. I’ve managed to explain auditory masking, the process in which we perceive sound, and the different levels of sound that we perceive all
Occupational Deafness Essay
605 Words | 3 PagesExposing ears to the loud noise destroy these hair cells causing possible loss of hearing. Complete deafness is however not the final result of this condition in a majority of cases. Though a total loss of hearing in both or one ear is possible, victims experience a buzzing, ringing sound hearing that goes in and out. Many of the victims may also experience difficulties in picking up sound vibrations correctly due to background noise. What are the roles of the loud decibel levels?
Categories Of Deafness
2005 Words | 9 PagesThe categories range from mild, having the least case of severity of deafness, through moderate then to severe, and ends at the worst-case severity, being profound deafness. A normal human being can hear sounds between 0 and 140 decibels. When the decibel is at zero, it means that there is no sound occurring. When the decibel is at 140, the noise is closely related to a person being nearby a siren on a Monday morning (“Harmful noise”, 2015). When a person is suffering from mild deafness, they are only able to detect sound between 25-29 decibels.
Hearing Loss: A Genetic Disease
602 Words | 3 PagesHearing loss is not always a genetic disease. Causes of deafness can rapidly (ly) travel (v) from ear infections, trauma, loud noise, some medication, birth defects, heredity, and aging. In this paper I will be discussing a few of these types of these causes. [3] Unfortunately hearing loss affects young and old people and even dogs. [2] Concerning pets, I have learned that these diseases can affect pets too.
More about External Auditory Structure
Cattle Primate Observation Report
308 Words | 2 PagesFish Chapter 14 Summary
926 Words | 4 PagesThrough The Deaf Eyes Analysis
354 Words | 2 PagesAudiological Evaluation Paper
449 Words | 2 PagesStimulated Hearing Loss Assignment Analysis
1111 Words | 5 PagesHearing Loss Simulation Analysis
728 Words | 3 PagesComprehensive Auditory Essay
396 Words | 2 PagesCochlear Argument Essay
690 Words | 3 PagesBeing Deaf Informative Speech
915 Words | 4 PagesPersonal Narrative Hearing Loss
797 Words | 4 PagesMastoiditis Research Paper
411 Words | 2 PagesEssay On Psychoacoustics
715 Words | 3 PagesOccupational Deafness Essay
605 Words | 3 PagesCategories Of Deafness
2005 Words | 9 PagesHearing Loss: A Genetic Disease
602 Words | 3 Pages