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The nerve reaches the surface by passing through the tympanomastoid fissure between the mastoid process and the tympanic part of the temporal bone, and divides into two branches: one joins the posterior auricular nerve. the other is distributed to the skin of the back of the ear (auricle) and to the posterior part of the ear canal.
The posterior auricular nerve is a nerve of the head. It is a branch of the facial nerve (CN VII). It communicates with branches from the vagus nerve, the great auricular nerve, and the lesser occipital nerve. Its auricular branch supplies the posterior auricular muscle, the intrinsic muscles of the auricle, and gives
This nerve, as it courses posteriorly to the condylar head, is frequently injured in temporomandibular joint (TMJ) surgery, causing an ipsilateral paresthesia of the auricle and skin surrounding the ear. It is the main nerve that supplies the TMJ, along with branches of the masseteric nerve and the deep temporal.
The folds of cartilage surrounding the ear canal are called the auricle. Sound waves are reflected and attenuated when they hit the auricle, and these changes provide additional information that will help the brain determine the sound direction. The sound waves enter the auditory canal, a deceptively simple tube.
The auditosensory cortex takes part in the reception and processing of auditory nerve impulses, which passes sound information from the thalamus to the brain. Abnormalities in this region are responsible for many disorders in auditory abilities, such as congenital deafness , true cortical deafness, primary progressive aphasia and auditory ...
Nerve supply [ edit ] Sensation of the outer surface of the tympanic membrane is supplied mainly by the auriculotemporal nerve , a branch of the mandibular nerve ( cranial nerve V 3 ), with contributions from the auricular branch of the vagus nerve ( cranial nerve X ), the facial nerve (cranial nerve VII), and possibly the glossopharyngeal ...
The posterior auricular nerve draws the auricle of the outer ear backwards. [2] This effect is usually very slight, although some people can wiggle their ears due to a more significant muscle movement. [2] Electromyographic signals in humans suggest the posterior auricular muscle may be part of an ancient system for monitoring sounds we can't ...
Coronal section of a human brain. BA41(red) and BA42(green) are auditory cortex. BA22(yellow) is Brodmann area 22, HF(blue) is hippocampal formation and pSTG is posterior part of superior temporal gyrus. The auditory cortex is the part of the temporal lobe that processes auditory information in humans and many other vertebrates.