Anatomy, blood supply, and nerve supply of the external ear
Parts of the external ear: auricle (pinna), external auditory canal, tympanic membrane
The external ear, comprising the auricle, external auditory canal, and tympanic membrane, is essential for sound conduction. Its blood and nerve supply ensure proper function and sensation.
6/6/2025• 4 min read• 64 views
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normalintermediateHuman Anatomy
Anatomy, Blood Supply, and Nerve Supply of the External Ear
The external ear consists of three major parts: the auricle (pinna), the external auditory canal, and the tympanic membrane. These structures play a crucial role in sound conduction and protection.
Auricle (Pinna)
The auricle, primarily composed of elastic cartilage, helps collect sound waves and direct them into the external auditory canal.
Blood Supply
- Superficial temporal artery
- Posterior auricular artery
Nerve Supply
- Great auricular nerve (C2, C3)
- Auriculotemporal nerve (branch of CN V3)
- Lesser occipital nerve
- Facial nerve (motor supply)
External Auditory Canal
A tubular structure leading to the tympanic membrane, composed of cartilage and bone.
Blood Supply
- Maxillary artery
- Posterior auricular artery
Nerve Supply
- Auriculotemporal nerve
- Vagus nerve (Arnold’s nerve)
Tympanic Membrane
A thin structure dividing the external ear from the middle ear, transmitting sound vibrations.
Blood Supply
- Deep auricular artery
- Anterior tympanic artery
Nerve Supply
- Auriculotemporal nerve
- Vagus nerve
- Glossopharyngeal nerve
Tags
#External Ear#Auricle#Tympanic Membrane#Nerve Supply#Blood Supply
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