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The term navicular bone or hand navicular bone was formerly used for the scaphoid bone, [1] one of the carpal bones of the wrist. The navicular bone in humans is located on the medial side of the foot, and articulates proximally with the talus, distally with the three cuneiform bones, and laterally with the cuboid.
Pathomechanic abnormalities involve shifting of the foot bones, which leads to a paradoxic flat foot, with a varus deformity instead of a valgus. [1] Multiple ligaments and the posterior tibial tendon attach to the navicular. These perform a significant function in acting as a dynamic stabilizer and maintaining bipedal biomechanics. [11]
An accessory navicular bone is an accessory bone of the foot that occasionally develops abnormally in front of the ankle towards the inside of the foot. This bone may be present in approximately 2-21% of the general population and is usually asymptomatic. [1] [2] [3] When it is symptomatic, surgery may be necessary.
Additionally, the Ottawa ankle rules indicate whether a foot X-ray series is required. It states that it is indicated if: There is any pain in the midfoot zone; and, Any one of the following: Bone tenderness at the base of the fifth metatarsal (for foot injuries), OR; Bone tenderness at the navicular bone (for foot injuries), OR
There are three cuneiform ("wedge-shaped") bones in the human foot: the first or medial cuneiform; the second or intermediate cuneiform, also known as the middle cuneiform; the third or lateral cuneiform; They are located between the navicular bone and the first, second and third metatarsal bones and are medial to the cuboid bone. [1]
The foot is usually dislocated medially (80%) and superiorly, which occurs when the foot is plantar flexed and inverted. Lateral displacement occurs during eversion injuries. Associated fractures of calcaneus, cuboid and navicular are frequent. Open fractures occur in a small percentage.
[2] [3] Dr. A. Köhler noted that children with foot pain displayed characteristics, within their x-rays, of irregularity in growth and development of the tarsal navicular bone in the foot. Furthermore, Köhler disease is known to affect five times more boys than girls and typically, only one foot is affected.
The calcaneonavicular ligament (ligamentum calcaneonaviculare) is attached to the lateral side of the navicular. (Note this is NOT the spring ligament which is commonly called the plantar calcaneonavicular ligament). It is commonly injured in "sprain-type" inversion injuries producing an avulsion fracture at the anterolateral process of the ...