CSF, Ventricles & Brain Anatomy
Frontal (anterior) horn
The frontal horn is the front portion of the lateral ventricle, extending into the frontal lobe of the brain.
In short: Frontal (anterior) horn
- It is the front extension of the lateral ventricle.
- It is a common reference point for measuring ventricle size.
- Catheters are often placed into it during shunt surgery.
- Its appearance is assessed on imaging in hydrocephalus.
What it is
The frontal (or anterior) horn is the portion of the lateral ventricle that extends forward into the frontal lobe of the brain. It is one of several named regions of the lateral ventricle.
Understanding Frontal (anterior) horn
The frontal horns are commonly used reference points on imaging — for example, in measuring the Evans index (a ratio used to assess ventricular enlargement) and the frontal and occipital horn ratio. They are also a frequent target for placing a ventricular catheter during shunt surgery, since they can be reached reliably. Their size and shape are assessed when evaluating hydrocephalus.
Why it matters
Understanding the frontal horn helps families recognize a structure often referenced on imaging and in surgery, both for measuring ventricle size and as a site where shunt catheters are placed.
Common questions
Where is the frontal horn?
In the front of the lateral ventricle, in the frontal lobe.
Why is it referenced?
It is used to measure ventricle size and as a catheter target.
Is it assessed in hydrocephalus?
Yes — its size and shape are evaluated on imaging.
Bottom line
The frontal horn is the front of the lateral ventricle, used to measure ventricle size and as a shunt catheter site.
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