Hearing: The Pathway PDF - Curtin University

Hearing: the pathway 1 Faculty of Health Sciences | School of Occupational Therapy, Social Work and Speech Pathology CRICOS Provider Code 00301J  Outer Ear...

Hearing: the pathway 1 Faculty of Health Sciences | School of Occupational Therapy, Social Work and Speech Pathology CRICOS Provider Code 00301J  Outer Ear Sound pressure waves are funneled by the Pinna (auricle) through the ear canal (external auditory meatus). Pressure waves strike the tympanic membrane (ear drum) causing it to vibrate. Faculty of Health Sciences | School of Occupational Therapy, Social Work and Speech Pathology CRICOS Provider Code 00301J  Middle Ear Ossicles amplify the mechanical movement and transfer it from the TM to the Oval Window Eustachian tube connects with nasopharynx and aerates the middle ear cavity & drains fluid (mucous) Faculty of Health Sciences | School of Occupational Therapy, Social Work and Speech Pathology CRICOS Provider Code 00301J  Inner Ear Faculty of Health Sciences | School of Occupational Therapy, Social Work and Speech Pathology CRICOS Provider Code 00301J  Inner Ear https://en.wikipedia.org/wiki/Cochlea 5 Faculty of Health Sciences | School of Occupational Therapy, Social Work and Speech Pathology CRICOS Provider Code 00301J  Inner Ear https://www.britannica.com/science/inner-ear#ref196743 Faculty of Health Sciences | School of Occupational Therapy, Social Work and Speech Pathology CRICOS Provider Code 00301J  The auditory nerve Cochlear and vestibular branches of CNVIII join at the internal auditory canal. Afferent impulses travel up CNVIII, through the brainstem to the auditory cortex. Decussation of impulses occur at cochlear nucleus. Results in binaural hearing (Doyle, 1998) https://dariuskohanmd.com/sensorineural-hearing-loss/ 7 Faculty of Health Sciences | School of Occupational Therapy, Social Work and Speech Pathology CRICOS Provider Code 00301J  The auditory cortex 8 Faculty of Health Sciences | School of Occupational Therapy, Social Work and Speech Pathology CRICOS Provider Code 00301J  The auditory cortex 10 Faculty of Health Sciences | School of Occupational Therapy, Social Work and Speech Pathology CRICOS Provider Code 00301J  The auditory cortex Superior temporal gyrus (temporal lobe). Primary auditory cortex processes: Temporal order of sounds Frequency combinations Secondary and tertiary auditory cortices process: Language Purves, Augustine, Fitzpatrick et al. (eds.) (2001) 11 Faculty of Health Sciences | School of Occupational Therapy, Social Work and Speech Pathology CRICOS Provider Code 00301J