Sulcus (morphology)
In biological morphology and anatomy, a sulcus (pl. sulci) is a furrow or fissure. It may be a groove in the surface of a limb or an organ, notably in the surface of the brain, but also in the lungs, certain muscles (including the heart), as well as in bones, and elsewhere. Many sulci are the product of a surface fold or junction, such as in the gums, where they fold around the neck of the tooth.
Gingival sulcus at neck of mammalian tooth
Rotating image of human brain, illustrating the lateral sulcus in the brain.
In invertebrate zoology, a sulcus is a fold, groove, or boundary, especially at the edges of sclerites or between segments.
Examples in anatomy
In the brain
Elsewhere
- anterior interventricular sulcus
- calcaneal sulcus
- coronal sulcus
- femoral sulcus or intercondylar fossa of femur
- gingival sulcus
- gluteal sulcus
- interlabial sulci
- intermammary sulcus
- intertubercular sulcus, the groove between the lesser and greater tubercules of the humerus (bone of the upper arm)
- lacrimal sulcus (sulcus lacrimalis)
- malleolar sulcus
- patellar sulcus or intercondylar fossa of femur
- posterior interventricular sulcus
- preauricular sulcus
- radial sulcus (musculospiral groove)
- sagittal sulcus
- separatoral sulcus (depression behind the brow ridges of some primates)
- sigmoid sulcus
- sulcus arteriæ vertebralis
- sulcus subtarsalis in the eyelid
- sulcus tubae auditivae
- tympanic sulcus
- urethral sulcus[1]
gollark: I'm pretty sure they do.```let y = {}y[1] = "banana"// y["1"] -> "banana"```
gollark: I think that object keys also get coerced to strings, weirdly.
gollark: I just find type coercion in JS weird.
gollark: Okay, yes, arguably.
gollark: This probably offends a lot of developers, but whatever.
References
- Larkins, Christine E., and Martin J. Cohn. "Phallus development in the turtle Trachemys scripta." Sexual Development 9.1 (2015): 34-42.
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