Nerve of the External Auditory Canal

The external auditory canal nerve is one of three nerves that form the tympanic branch of the facial nerve. It passes through the external auditory canal and provides sensation to the skin and muscles of the outer ear.

The tympanic branch of the facial nerve begins in the region of the cerebellopontine angle, where it connects with the auriculotemporal nerve. It then passes through the parotid gland, where it joins the auriculotemporal nerve. It then passes through the external auditory canal, where it connects with the external auricular nerve.

The external auditory canal nerve controls sensation in the skin and muscles of the outer ear, including the skin of the outer ear, the skin over the pinna, the skin around the external auditory opening, and the muscles that help move the pinna and close the ear opening.

If the nerve to the external auditory canal becomes damaged, it can cause loss of sensation in the skin of the outer ear and impaired movement of the pinna. It is also possible to develop otitis media or other ear diseases. To avoid damage to the nerve of the external auditory canal, it is necessary to maintain ear hygiene and avoid injury to the ear.

External auditory canal nerve (tympanic membrane nerve)

**Content:**

_Has everyone heard the clicking of the keys of a typewriter or the sound of glass creaking under your foot?_ _If not, what do you hear?_

When the same point of a nerve is irritated at different levels, the sensitive cells in the neuron obey a directly proportional law of the strength of irritation and the strength of excitation of the nerve cell, expressed as follows: the stronger the irritation, the stronger the response excitation of the nerve cell. Based on this, it should be assumed that the cells at the level of the focus of auditory sensation are more sensitive to excitation than the cells of the sensory pathways, since they transmit a larger percentage of excitatory impulses to the neurons following them. Consequently, if more pressure is applied to this point of the nerve, then the resistance to the transmitted information will be greater (important signals from the nerve will be more likely to be suppressed), which is why the number of impulses reaching the central organ of hearing decreases. In addition, it is likely that the most important and informative stimuli (for example, music from a loudspeaker) carry the bulk of the energy from the nerve impulse, and if the frequency of these signals is high enough and their length is short enough, then the excitation transmitted by the cells of the hairs of Corti will cause false