Astacus channel
The channel of Estacus, or so-called “Nfir” between the middle ear and nasal pharynx, where the channel consists of three parts, and the part closest to the middle ear of bone nature and the remaining two of the nature of cartilage. The channel is about 35 millimeters long, and is connected to this channel a large group of small muscles, and the origin of the label to the world of anatomy in the sixteenth century Astacius.
The function of the Astacus channel
- The work of the Astacus channel can be summarized in the regulation or “pressure equation on the sides of the eardrum”, which protects the eardrum from any harm it can cause as a result of changes in air pressure on its sides. This shows when a person climbs to a high place like a mountain or plane, the air pressure is low Which causes the eardrum to strain outward. This forces the person to swallow a saliva, which causes the muscle to contract and allow the air to pass through the middle ear, thereby restoring the pressure and equalizing it in the ear. This allows the eardrum to return to its normal shape. Again by entering the air.
- Drainage of the mucus from the middle ear: When a person gets colds or inflammation in the respiratory tract, the Astacius channel swells and accumulates in the bacteria causing severe ear infection, forcing the person to take anti-inflammatories to conceal pain and treat inflammation, and this channel is smaller and narrower in children, Which causes more severe pain in children in the case of inflammation because of difficulty in removing mucous discharge through the channel in children.
Muscle related to the Astacius channel
The vaginal nerve and trigeminal nerves feed four muscles connected to the astacius channel:
- Muscle palate palate palate, nourished by vagus nerve.
- Pharyngeal pharyngeal muscle, and fed by vagus nerve.
- Musculoskeletal muscle, fed by trigeminal nerve.
- Muscle palate palate palate, fed by trigeminal nerve.
Diseases of the channel of Astacus
- Osteoarthritis in children under the age of 7 years, affecting the safety of the canal.
- Pressure changes between the outer perimeter and the middle ear, causing damage to the channel.
- The accumulation of mucous secretions in the middle ear due to a congenital defect, which affects the hearing.
- Osteoarthritis and the accumulation of secretions and bacteria inside them as a result of addiction to smoking.