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In human anatomy, the forehead is an area of the Human head bounded by three features, two of the human skull and one of the scalp. The top of the forehead is marked by the hairline, the edge of the area where hair on the scalp grows. The bottom of the forehead is marked by the supraorbital ridge, the bone feature of the skull above the eyes. The two sides of the forehead are marked by the temporal line, a bone feature that links the supraorbital ridge to the coronal suture line and beyond. (2025). 9780781720748, Lippincott Williams & Wilkins. ISBN 9780781720748 (2025). 9780071472562, McGraw-Hill Professional. ISBN 9780071472562 However, the eyebrows do not form part of the forehead.
In Terminologia Anatomica, sinciput is given as the Latin equivalent to "forehead" (etymology of sinciput: from semi- "half" and caput "head".).
The sensory nerves of the forehead connect to the ophthalmic branch of the trigeminal nerve and to the cervical plexus, and lie within the subcutaneous fat. The motor nerves of the forehead connect to the facial nerve. The ophthalmic branch of the trigeminal nerve, the supraorbital nerve, divides at the orbital rim into two parts in the forehead. One part, the superficial division, runs over the surface of the occipitofrontalis muscle. This provides sensation for the skin of the forehead, and for the front edge of the scalp. The other part, the deep division, runs into the occipitofrontalis muscle and provides frontoparietal sensation.
Blood supply to the forehead is via the left and right superorbital, supertrochealar, and anterior branches of the superficial temporal artery.
Pseudo-Aristotle, in Physiognomica, stated that the forehead is governed by Mars. A low and little forehead denoted magnanimity, boldness, and confidence; a fleshy and wrinkle-free forehead, litigiousness, vanity, deceit, and contentiousness; a sharp forehead, weakness and fickleness; a wrinkled forehead, great spirit and wit yet poor fortune; a round forehead, virtue and good understanding; a full large forehead, boldness, malice, boundary issues, and high spirit; and a long high forehead, honesty, weakness, simplicity, and poor fortune.
In fighting, slamming one's forehead into one's opponent is termed a headbutt.
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