The Anatomy of the Human Ear (The Inner Ear)

Anatomy-Of-Ear-In-the-inner-ear-thousands-of-microscopic-hair-cells-are-bent-by-the-wavelike-action-of-fluid-inside-the-cochleaAnatomy of the Outer Ear
Anatomy of the Middle Ear

The inner ear is the innermost part of the ear, which consist of the cholera part, the balance apparatus, the vestibular and the auditory nerve.

After the vibrations of the eardrum have been transmitted to the oval window, the sound waves continue their journey into the inner ear.

The inner ear consists of various tubes and passages referred to as the labyrinth. IN the labyrinth there is the vestibular and the cochlea.

The cochlea
The cochlea transforms sound waves into electrical impulses, which are sent to the brain. The brain will then translate the impulses into sounds that we understand.

The cochlea is shaped like a small snail shell or a wound-up tube. The cochlea is occupied with a perilymph fluid, as well as two tightly placed membranes. These membranes form a kind of divider wall in the cochlea. Nevertheless, for perilymph fluid to move easily in the cochlea from one side of the divider wall to the other, the wall has a tiny hole in it (the helicotrema). The hole is essential for ensuring that vibrations from the oval window are spread to all the fluid in the cochlea.

When the perilymph fluid travels inside the cochlea, thousands of microscopic hair fibers within the divider wall are activated. There are approximately 24,000 of these hair fibers, arranged in four long rows.

The auditory nerveInner-Ear-Anatomy-For-Inspiration-Medice-ear_anatomy

The auditory nerve is a combination of nerve fibers that transport information among the cochlea, in the inner ear, and the brain. The purpose of the auditory nerve is to send signals from the inner ear to the brain.

The hair fibers in the cochlear are all connected to the auditory nerve and, based on the type of the movements in the cochlear fluid; different hair fibers begin to move.

During hair fiber movement, electrical signals are sent to the auditory nerve which is attached to the auditory center of the brain. In the brain, these electrical impulses are converted into sounds, which we identify and comprehend. As an effect; these hair fibers are fundamental to our hearing ability. If these hair fibers become impaired, then our hearing ability will deteriorate.

ear-anatomy-inner3
The vestibular- the balance apparatus

The vestibular is another essential portion of the inner ear. The vestibular is the organ of equilibrium. The vestibular’s role is to record and transmit the body’s movements, thus ensuring that we can keep our balance.

The vestibular encompasses three ring-shaped passages, which are in three different planes. All three passageways are filled with fluid that moves along with the body movements. Along with this fluid, these passageways contain thousands of micro hair fibers which react to the movement of the fluid by sending small impulses to the brain. The brain will then decode these pulses which are used to help the body keep its balance.

Anatomy of the Outer Ear
Anatomy of the Middle Ear


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by
Health Life Media Team