fossa /fos·sa/ (fos´ah) pl. fos´sae [L.] a trench or channel; in anatomy, a hollow or depressed area.
canine fossa
canine (kā´nīn),
fossa(e) (fos´
),
acetabular fossa a nonarticular area in the floor of the acetabulum.
adipose fossae subcutaneous spaces in the female breast which contain fat.
axillary fossa the small hollow underneath the arm where it joins the body at the shoulder.
canine fossa a depression on the external surface of the maxilla superolateral to the canine tooth socket.
condylar fossa either of two pits on the lateral part of the occipital bone.
coronoid fossa of humerus a depression in the humerus for the coronoid process of the ulna.
cranial fossa any one of three hollows (anterior, middle, and posterior) in the base of the cranium for the lobes of the brain.
digastric fossa
1. a depression on the inner surface of the mandible, giving attachment to the anterior belly of the digastric muscle.
2. mastoid notch.
digital fossa
2. femoral ring.
3. the depression on the inside of the anterior abdominal wall lateral to the lateral umbilical fold.
duodenojejunal fossa either of two peritoneal pockets, one behind the inferior and the other behind the superior duodenal fold.
ethmoid fossa the groove in the cribriform plate of the ethmoid bones, for the olfactory bulb.
hyaloid fossa a depression in the front of the vitreous body, lodging the lens.
hypophysial fossa a depression in the sphenoid, lodging the pituitary gland.
iliac fossa a concave area occupying much of the inner surface of the ala of the ilium, especially anteriorly; from it arises the iliac muscle.
incisive fossa of maxilla a slight depression on the anterior surface of the maxilla above the incisor teeth.
infraspinous fossa the large, slightly concave area below the spinous process on the dorsal surface of the scapula.
infratemporal fossa an irregularly shaped cavity medial or deep to the zygomatic arch.
ischioanal fossa , ischiorectal fossa a potential space between the pelvic diaphragm and the skin below it; an anterior recess extends a variable distance between the pelvic and urogenital diaphragms.
Jobert's fossa a fossa in the popliteal region bounded by the adductor magnus and the gracilis and sartorius muscles.
lacrimal fossa a shallow depression in the roof of the orbit, lodging the lacrimal gland.
lateral cerebral fossa sylvian fossa; in the fetus, a depression on the lateral surface of each cerebral hemisphere; it becomes the sylvian fissure and its floor becomes the insula.
mandibular fossa a depression in the temporal bone in which the condyle of the mandible rests.
mastoid fossa a small triangular area between the posterior wall of the external acoustic meatus and the posterior root of the zygomatic process of the temporal bone.
nasal fossa the portion of the nasal cavity anterior to the middle meatus.
navicular fossa
1. the vaginal vestibule between the vaginal orifice and the frenulum of the pudendal labia.
2. the lateral expansion of the urethra of the glans penis.
3. a depression on the internal pterygoid process of the sphenoid, giving attachment to the tensor veli palatini muscle.
fossa ova´lis cor´dis a fossa in the right atrium of the heart; the remains of the fetal foramen ovale.
ovarian fossa a shallow pouch on the posterior surface of the broad ligament, in which the ovary is located.
popliteal fossa the depression in the posterior region of the knee.
rhomboid fossa the floor of the fourth ventricle, made up of the dorsal surfaces of the medulla oblongata and pons.
Rosenmüller's fossa pharyngeal recess.
subarcuate fossa of temporal bone a depression in the posterior inner surface of the petrous portion of the temporal bone.
subsigmoid fossa a fossa between the mesentery of the sigmoid flexure and that of the descending colon.
supraspinous fossa a depression above the spine of the scapula.
sylvian fossa
tibiofemoral fossa a space between the articular surfaces of the tibia and femur mesial or lateral to the inferior pole of the patella.
trochanteric fossa a depression on the medial surface of the greater trochanter, receiving the tendon of the obturator externus muscle.
urachal fossa one on the inner abdominal wall, between the urachus and the hypogastric artery.
Waldeyer's fossa the two duodenal fossae regarded as one.
zygomatic fossa infratemporal f.
canine fossa
[kā′nīn]
Etymology: L, canis, dog; L, ditch
(in dentistry) either of the wide depressions on the external surface of each maxilla, superolateral to the canine tooth socket. It is the origin of the levator anguli oris muscle. Also called maxillary fossa.
canine (kā´nīn),
n one of the four pointed teeth situated one on each side of each jaw, distal to the lateral incisor; forms the keystone of the arch. Older term is
cuspid.
cuspid.
canine eminence
n a bony projection that covers the root of the canine tooth on the labial surface of the maxillary arch.
canine fossa,
n See fossa, canine.
canine guidance,
n a concept of occlusal function in which the canine teeth are assigned a major control role in the excursive movements of the mandible.
fossa(e) (fos´
),n a pit, hollow, or depression on a tooth or bone.
)
Fossa.
fossa, articular,
n a concave structure situated adjacent to the articular eminence on the temporal bone of the skull. Also known as the
mandibular fossa.
mandibular fossa.
fossa, canine,
n the fossa in the canine maxilla superior to the apex of the canine tooth.
fossa, depth of,
n on the occlusal table, the distance from the top of the shorter cusp downward into the bottom of the fossa.
fossa, lateral,
n a shallow, concave area of peritoneum on the rear wall of the abdominal cavity, bordered by the lateral umbilical fold and the inguinal ligament.
fossa, mental,
n a depression located between the alveolar and mental ridges of the roots of the incisors.
fossa, nasal,
n See cavity, nasal.
n a depression located between the maxilla and the sphenoid bone in the anatomy of the skull.
fossa, sublingual,
n a depression found underneath the tongue, adjacent to the sublingual glands.
fossa, submandibular,
n a depression found underneath the internal oblique ridge, which houses the submandibular salivary gland.
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