This article is about the tailbone in apes and analogous structures. For animals with tails, see Caudal vertebrae. For the moth genus, see Cydia (genus).
"Coccyges" redirects here. For the clade of birds, see Cuculiformes and Parrot.
Coccyx
The coccyx
The coccyx is the final bone in the vertebral column that surrounds the spinal cord.
Details
Pronunciation
/ˈkɒksɪks/KOK-siks
Identifiers
Latin
os coccygis
MeSH
D003050
TA98
A02.2.06.001
TA2
1092
FMA
20229
Anatomical terms of bone
[edit on Wikidata]
The coccyx (pl.: coccyges or coccyxes), commonly referred to as the tailbone, is the final segment of the vertebral column in all apes,[1] and analogous structures in certain other mammals such as horses. In tailless primates (e.g. humans and other great apes) since Nacholapithecus (a Miocene hominoid),[2][3] the coccyx is the remnant of a vestigial tail. In animals with bony tails, it is known as tailhead or dock, in bird anatomy as tailfan. It comprises three to five separate or fused coccygeal vertebrae below the sacrum, attached to the sacrum by a fibrocartilaginous joint, the sacrococcygeal symphysis, which permits limited movement between the sacrum and the coccyx.
^Weisberger, Mindy (March 23, 2024). "Why don't humans have tails? Scientists find answers in an unlikely place". CNN. Archived from the original on March 24, 2024. Retrieved March 24, 2024.
^Nakatsukasa 2004, Acquisition of bipedalism (See Fig. 5 entitled First coccygeal/caudal vertebra in short-tailed or tailless primates..)
^Note: Nacholapithecus and Nakaliphitecus nakayamai are two different species of Miocene hominoids (specimens from Nakali and Nachola respectively). See for example "Comparisons with Other Hominoids" in (Kunimatsu, Nakatsukasa et al. Dec 2007)
The coccyx (pl.: coccyges or coccyxes), commonly referred to as the tailbone, is the final segment of the vertebral column in all apes, and analogous...
Coccydynia is a medical term meaning pain in the coccyx or tailbone area, often brought on by a fall onto the coccyx or by persistent irritation usually from...
A coccyx fracture is a fracture of the coccyx, commonly called a broken tailbone or ‘puzzle fracture.’ The coccyx is located at the base of the spine...
pelvic skeleton is formed in the area of the back, by the sacrum and the coccyx and anteriorly and to the left and right sides, by a pair of hip bones....
connects with the last lumbar vertebra (L5), and its lower part with the coccyx (tailbone) via the sacral and coccygeal cornua. The sacrum has three different...
hip bones join at the pubic symphysis and together with the sacrum and coccyx (the pelvic part of the spine) comprise the skeletal component of the pelvis...
part of the tendinous arch of the obturator fascia, and is attached to the coccyx and anococcygeal body; it is usually thin, and may be absent, or be largely...
the lower nine are fused in adults, five in the sacrum and four in the coccyx, or tailbone. The articulating vertebrae are named according to their region...
the region of the body between the pubic symphysis (pubic arch) and the coccyx (tail bone), including the perineal body and surrounding structures. The...
definition of axial skeleton is the bones including the vertebrae, sacrum, coccyx, skull, ribs, and sternum. Flat bones house the brain and other vital organs...
vertebrae (5 bones) Sacrum (5 bones at birth, fused into one after adolescence) Coccyx (set of 4 bones at birth) The bony pelvis consists of two parts: anterior...
It is the part of the body that corresponds roughly to the sacrum and coccyx in mammals, reptiles, and birds. While tails are primarily a feature of...
rectum is located at the back of the pelvis, in the curve of the sacrum and coccyx; the bladder is in front, behind the pubic symphysis. The pelvic cavity...
cleavage Butts: A Backstory Cultural history of the buttocks Cellulite Coccyx Dimples of Venus Hip and buttock padding Intimate part Waist–hip ratio Norman...
coccyx or tailbone is removed. It is considered a required treatment for sacrococcygeal teratoma and other germ cell tumors arising from the coccyx....
inferior-ward from the apex of the conus medullaris to attach onto the coccyx.: 453 The filum terminale acts to anchor the spinal cord and spinal meninges...
paired bundle of nerve fibers that run from the base of the skull to the coccyx. They are a major component of the sympathetic nervous system. The sympathetic...
typically occur between the ages of 15 and 35. Although usually found near the coccyx, the condition can also affect the navel, armpit, the cheek, or the genital...
medullaris to the back of the coccyx. The filum terminale provides a connection between the conus medullaris and the coccyx which stabilizes the entire...
vagina in women, and the other pelvic organs. Extensor coccygis Coccyx Coccydynia (coccyx pain, tailbone pain) Pubococcygeus muscle This article incorporates...
for example, the joints of the knee, elbow and shoulder and into a broken coccyx. Cortisone is used by dermatologists to treat keloids, relieve the symptoms...
vertebrae forming the sacrum and four coccygeal vertebrae, forming the coccyx. Excluding rare deviations, the total number of vertebrae ranges from 32...
the sacrum and coccyx) is an amphiarthrodial joint, formed between the oval surface at the apex of the sacrum, and the base of the coccyx. It is a slightly...
have only three to five vestigial caudal vertebrae, fused into an internal coccyx).: 11 The extra lumbar and thoracic vertebrae account for the cat's spinal...
cancerous. Definitive diagnosis is based on a tissue biopsy. Treatment of coccyx, testicular, and ovarian teratomas is generally by surgery. Testicular and...
anococcygeal nerve) a small area of skin between the tip of the coccyx, and the anus. Coccydynia (coccyx pain, tailbone pain) Ganglion impar Sacral plexus Moore...
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