Spina helicis

Spina helicis is a small pointed eminence situated in front of the auricle of the human ear, more specifically on the anterior margin of the concha. It is a part of the external ear, or pinna, and contributes to the complex structure that collects and modifies sound waves traveling to the eardrum.

Anatomy

The spina helicis is a small, pointed protrusion of the ear, located at the front of the auricle. It is made up of cartilage, a flexible and resilient material that gives shape and support to various structures in the body. The spina helicis is covered by a thin layer of skin and is devoid of any hair or sweat glands.

The spina helicis is located near the entrance of the ear canal, or external auditory meatus, and is positioned to help direct sound waves into the ear. It is one of several structures on the auricle that help to collect and funnel sound waves into the ear canal.

Function

The primary function of the spina helicis, like other parts of the auricle, is to collect and direct sound waves into the ear canal. The shape and position of the spina helicis help to funnel these sound waves towards the eardrum. This process is essential for the perception of sound and the ability to determine the direction from which a sound is coming.

Clinical significance

While the spina helicis is a small structure, abnormalities or injuries to it can cause discomfort or affect the function of the ear. Conditions such as chondrodermatitis nodularis helicis, a painful inflammatory condition, can affect the spina helicis. Treatment for this condition often involves conservative measures such as pressure relief, but in some cases, surgical intervention may be necessary.

See also

• Auricle (anatomy)
• Concha (ear)
• External auditory meatus
• Chondrodermatitis nodularis helicis