Thursday, April 22, 2010

Flesh & Bone: Tibialis Anterior & The Lacrimal Bone

Tibialis Anterior & The Lacrimal Bone:

Tibialis Anterior as a dorsiflexor is an antagonist to gastrocnemius, soleus, plantaris, fibularis longus & tibilais posterior. It originates on the body of the tibia, specifically at the upper two-thirds of the lateral surface, as well as the lateral tibial condyle and the interosseous membrane.  It inserts into the medial and plantar surfaces of the medial cuneiform and the base of the first metatarsal bone along the medial and plantar surfaces.  It is innervated by the deep fibular nerve or peroneal nerve. Its artery is the anterior tibial artery. Its associated meridian is the bladder meridian. Its actions are dorsiflexion and inversion of the foot.

The lacrimal bone

or Os Lacrimale from the Latin lacrima meaning tear; the lacrimal bone is the smallest bone of the face and cranium.
It articulates with the inferior nasal concha as well as the maxilla, frontal & ethmoid bones. It helps to form a portion of the nasolacrimal canal through which tears run from the tear duct to the nasal cavity. It is the most delicate bone in the face. The lacrimal bone ossifies from a single center during the twelfth week of life.

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