Cranial ridge

The cranial ridges, also referred to as exo-cranial ridges or cranial plates were bony plates on the surface of the forehead on many humanoid species.
Klingon-Human hybrids generally inherited cranial ridges from their Klingon parent, although they were less pronounced. ()
In 2154, the Klingon augment virus, and the subsequent cure, caused many Klingons to lose their cranial ridges and become more like "Humans." This would be partially cured via cranial reconstruction. ()
During the 23rd century of the alternate reality, helmets issued to the Klingon Defense Force gave all warriors the appearance of cranial ridges. ()
As a child, B'Elanna Torres was often mocked and joked at because of her Klingon-inherited cranial ridges. She was referred to by Daniel Byrd as "Miss Turtle Head." () Partly because of this bullying, after she discovered she was pregnant, Torres attempted to resequence the DNA of her fetus in order to eliminate the genes that would manifest cranial ridges. However, she was convinced by her husband, Tom Paris, to abandon this effort. ()
The Cytherian encountered by the in 2367 was fascinated by Worf's prominent cranial plate, among other things. ()
In 2370 of an alternate timeline, Alexander Rozhenko made a plaster cast of his forehead cranial ridges as a birthday gift to his father, Worf, who received it with pride. ()
When he de-evolved due to Barclay's Protomorphosis Syndrome, Worf's cranial plates thickened by 20%. ()
Death is immediate for a Klingon if the cranial exoskeleton is shattered at the tricipital lobe. ()
Ktarians have sharp exocranial ridges, which are also present in Ktarian-Human hybrids. If the mother is Human, these ridges can cause a rare complication where they become lodged in the uterine wall, as was the case with Naomi Wildman's birth in 2372. ()
File:KVagh.jpg|The cranial exoskeleton of a Klingon.
File:Jonathan Archer with Klingon ridges.jpg|A Human infected by the Klingon augment virus.
File:Worf de-evolved.jpg|A proto-Klingon with a thickened cranial plate.
File:Naomi Wildman, 2394.jpg|A Ktarian-Human hybrid with exocranial ridges.
== Species with cranial ridges ==
* Only Klingons have been stated to have "cranial ridges." The following species have been observed to have ridge-like structures, indicating bone, underneath their foreheads.
** Abaddon's species
** Abdon's species
** Akaali
** Akritirian
** Algolian
** Allos' species
** Andoran
** Andorian
** Ankari
** Annari
** Antaran
** Antarian
** Antedian
** Antican
** Argrathi
** Arkarian
** Arkonian
** Axanar
** Axum's species
** B'omar
** Banea
** Barzan
** Benkaran
** Benthan
** Borothan
** Boslic
** Botha
** Brunali
** Caatati
** Caldonian
** Cardassian
** Chalnoth
** Chokuzan
** Cytherian
** Dala's species
** Daliwakan
** Dee'Ahn's species
** Denobulan
** Devore
** Dralian
** Dream Aliens
** Efrosian
** El-Adrel IV lifeform
** Elaysian
** Emi's species
** Entharan
** Eska
** Etanian
** Fallit Kot's species
** Fantome's species
** Farian
** Flaxian
** Garan
** Gosis' species
** Grazerite
** Haakonian
** Hanonian
** Hazari
** Hekaran
** Hirogen
** Idanian
** Ilari
** Illyrian
** Iyaaran
** J'naii
** Jarlath's species
** Jem'Hadar
** Kadi
** Kago's species
** Karemma
** Kazon
** Kesat
** Kesprytt
** Klingon
** Kobliad
** Kolaati
** Kolaran
** Kreetassan
** Kressari
** Krit's species
** Ktarian
** Ledosian
** Lethean
** Lokirrim
** Malcorian
** Malon
** Markalian
** Mintakan
** Miradorn
** Mislenite
** Mizarian
** Na'kuhl
** Napean
** Nara's species
** Nasari
** Nausicaan
** Nezu
** Night Alien
** Nuvian
** Nygean
** Osaarian
** Otrin's species
** Pakled
** Pandronian
** Parada
** Pelian
** Pendari
** Pomet's species
** Prah Mantoos' species
** Promellian
** Qomar
** R'Kaal
** Rakhari
** Rakosan
** Retellian
** Rigelian
** Romulan Northerners
** Rotciv
** Sakari
** Saowin's species
** Sarda's species
** Selay
** Sky Spirit
** Solanogen-based lifeform
** Solari
** Species 571
** Species 6339
** Species 8472
** Species 10026
** Swarm species
** Tak Tak
** Takaran
** Talarian
** Talaxian
** Talura's species
** Tamarian
** Tanugan
** Tarkalean
** Tarlac
** Tarquin's species
** Tash's species
** Telsian
** 
** Tessic's species
** Tiburonian
** Tilonian
** Trabe
** Tret's species
** Triannon
** Turei
** Tygarian
** V'radian
** Vaadwaur
** Valerian
** Varn's species
** Vaskan
** Ventu
** Vhnori
** Vian
** Vidiian
** Viorsa's species
** Voth
** Wysanti
** Xindi-Arboreal
** Xindi-Primate
** Xindi-Reptilian
** Xyrillian
** Yost's species
** Yridian
** Zahl
** Zalkonian
** Zaranite
** Zolan's species
== Appendices ==
=== See also ===
* Nose ridge
=== Background information ===
During Star Trek productions, some aliens were introduced without ridges, but ridges were added in later productions. Some aliens this happened to include:
* Romulans ( vs. )
* Klingons ( vs. )
* Andorians ( vs. )
* Tiburonians ( vs. )
In the final draft script of , a person off-screen who Charles Tucker III and Malcolm Reed notice in a Risan nightclub was scripted to be referred to as having cranial ridges, with Reed stating, "She's got lovely cranial ridges." However, the only comment made about this unseen individual in the final version of the episode is Tucker remarking, "I don't think 'she' is the right pronoun."
Category:Bones