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Infratrochlear nerve: anatomy, location and function

The infratrochlear nerve is a terminal branch of the nasociliary nerve supplying the medial eye region and root of the nose. It is sensory to the skin of the medial eyelids, side of the nose root, conjunctiva, lacrimal sac and caruncle.

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Structures

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Highlighted in the model: Infratrochlear nerve. Click any part to read about it, or switch off “Highlight topic” to see the whole body. 3D data: BodyParts3D, © The Database Center for Life Science, CC BY 4.0; meshes simplified and recoloured. The model is an adult male.

Infratrochlear nerve at a glance

What it is
The infratrochlear nerve is a terminal branch of the nasociliary nerve supplying the medial eye region and root of the nose.
Location
It runs forward along the upper medial orbital wall below the trochlea of the superior oblique and exits the orbit at its medial angle.
Function
It is sensory to the skin of the medial eyelids, side of the nose root, conjunctiva, lacrimal sac and caruncle.
Body system
Nervous · paired (left and right)
FMA ID
FMA52699 (Foundational Model of Anatomy)

Key facts

  • Branch of CN V1.
  • Can communicate with the supratrochlear nerve.

Structures next to the infratrochlear nerve

The nearest named structures in the 3D model, measured from the centre of each part:

References

  1. Foundational Model of Anatomy: Infratrochlear nerve (FMA52699). EMBL-EBI Ontology Lookup Service.
  2. OpenStax. Anatomy and Physiology 2e, §12.1 Basic Structure and Function of the Nervous System. Rice University, 2022.
  3. Mitsuhashi N. et al. (2009). BodyParts3D: 3D structure database for anatomical concepts. Nucleic Acids Research 37, D782–D785. Data © The Database Center for Life Science, CC BY 4.0.

Explore the whole body in the interactive 3D human anatomy model, or browse the A–Z list of human structures.