Each of the small rounded projections formed by the areolar glandular structures especially when enlarged during pregnancy. Listers tubercle or the dorsal tubercle of the radius is a bony protuberance on the dorsal surface of the distal radius.
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It separates the 2 nd ECRB and ECRL and 3 rd EPL extensor compartments.
S TUBERCLE. According to the Basic and Clinical Science Course it is typically around 11 mm inferior to the frontozygomatic suture the junction between the frontal bone and zygomatic bone 1 and sits 4-5 mm posterior to the lateral orbital rim around the midline 2. The other lower leg bone is the fibula. The lateral orbital tubercle or Whitnalls tubercle is found on the zygomatic bone.
When it has a pedunculated or nodular appearance sometimes due to the lateral impression of the common carotid artery the tubercle can be mistaken for a thyroid nodule enlarged parathyroid or lymph node 1. The feature is named after Pierre Nicolas Gerdy the 19th-century French surgeon who first described it. Especially the deposit which accompanies scrofula or phthisis.
Gerdys tubercle is located at the tibia right below the knee joint. It acts as a pulley for the EPL tendon changing its mechanical direction of action. The tibia is the bigger and stronger of the two and is known as the bodys sturdiest weight-bearing bone.
In anatomy a tubercle literally small tuber Latin for lump is any round nodule small eminence or warty outgrowth found on external or internal organs of a plant or an animal. Darwins tubercle is a congenital ear condition which often presents as a thickening on the helix at the junction of the upper and middle thirds. Gerdys tubercle is the area where the iliotibial band and the fascia lata go into the tibia.
This is composed of a hard grayish or yellowish translucent or opaque matter which gradually softens and excites suppuration in its vicinity. The tubercle is an important surgical landmark as the recurrent laryngeal nerve passes immediately medial to it 3. The roles of environmental and genetic factors in its development remain unclear and it is a benign lesion that does not appear to have significant clinical sequelae.
Any of several sebaceous glands on the areolae of the breast that lubricate and protect the breast during breastfeeding. Tubercle noun A small mass or aggregation of morbid matter. Scalene tubercle is a slight elevation in the form of a tubercle on the superior aspect of the first rib.
Darwins tubercle is a vestigial characteristic that was first documented by Thomas Woolner in the 1800s and brought to the public attention by Charles Darwin. Recognizing this finding as a normal variant is important for avoiding. The tubercle is located in between the impressions left by the subclavian artery and the subclavian vein on the first rib.
Listers tubercle is an old term for prominent bony tubercle over the dorsal aspect of the distal radius 1 which functions as a pulley for the extensor pollicis longus tendon before the tendon pivots and turns obliquely to insert onto the distal phalanx of the thumb 2. The tibia also known as the shankbone or the shinbone is one of the two bones of the lower leg which is the part below the knee. In anatomy a tubercle is any round nodule small eminence or warty outgrowth found on external or internal organs of a plant or an animal.
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