Pelvic Tilt

Pelvic Tilt is defined angle between the vertical and the line through the midpoint of the sacral plate to femoral heads axis.

Pelvic tilt, sacral slope and pelvic incidence

Pelvic tilt, sacral slope and pelvic incidence

Normal average is 40°.

Overhang defined as the horizontal offset between the midpoint of the sacral plate and the femoral heads axis.

Sum of sacral slope and pelvic tilt gives pelvic incidence.

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Pelvic Incidence

Pelvic Incidence is defined as the angle between the line joining the middle of the sacral endplate to the middle axis of the femoral heads.

The pelvic incidence is unique anatomical parameter for each individual and is independent of position or spatial orientation. Pelvic incidence is closely related to Sacral Slope and pelvic tilt [Read more...]

What Is A Pseudofracture?

Pseudofracture is a radiological finding on an xray.

As its name It is an appearance similar to a fracture line but is not a fracture in true sense, hence the name. However, some consider it to be a form of insufficiency type of stress fracture.

A pseudofracture appears as a lucent area on radiographs that is oriented at right angles to the cortex and extends from the surface across the diameter of the bone. Frequently sclerosis occurs at margins between bones, and callus-like new bone is observed at the periosteal margin.

Pseudofractures are typically found in the axillary margins of the scapula, ribs, pubic rami, proximal ends of the femora and ulna. [These regions of presilection are in ptients of osteomalacia]

Pseudofractures are also called as Looser Zones. They represent deficient mineralization. [Read more...]

Os Vesalianum

Os vesalianum pedis is an accessory bone of the foot located proximal to the fifth metatarsal and found within the peroneus brevis tendon. It is a rare occurrence [Incidence-0.1% and 0.4%]

The Os Vesalianum should be differentited in cases of fifth metatarsal avulsion fracture, ossifying apophysis of the fifth metatarsal base, Iselin’s disease, an ununited apophysis of the fifth metatarsal base and a fracture of the tuberosity of the fifth metatarsal, nonunion of a tuberosity fracture of the fifth metatarsal and an os peroneum. [Read more...]

Rocker Bottom Shoe

A rrocker bottom shoe is a shoe which has a thicker-than-normal sole with rounded heel to ensure the wearer does not have flat footing along the proximal-distal axis of the foot. Other terms for this shoe are round bottom shoes, rounded sole shoes and toning shoes.

ROCKER BOTTOM SHOE

Rocker Bottom Shoe

Uses

  • To reduce the function or replace the lost function of a joint
  • To compensate for the lost range of motion

Rocker Bottom Shoes should be worn when advised by your doctor.

What is Risser Sign?

Risser sign is a radiographic sign that is used to assess skeletal maturity. The sign was described by Joseph Risser in 1958. Risser observed that as the growth plate on top of the pelvis (iliac apophysis) completed growing, it changed from cartilage to bone. Normally, the apophysis is not visible on xray as it is cartilaginous in nature.

As it ossifies, the part that gets ossified is visible on xray and based on this visibility, the Risser sign is of following types [See image for correlation] [Read more...]

Phalanges

Phalanges are the bones that form the fingers and toes.

Phalanges are of three types

Distal phalanges

These form tips of the fingers and toes. These articulate with middle phalanges on their respective digits.

Proximal phalanges

These articulate with metacarpal heads of the hand in foot with metatarsal head.

Middle or Intermediate phalanges

These phalanges are between the distal and proximal phalanges. [Read more...]

Pyramidal Syndrome

The pyramidal syndrome consists of all the symptoms which are caused by  partial or complete damage of the pyramidal tract and is suggested by

  • Spasticity
  • Progressively weak muscle
  • Wasted muscles
  • Increased deep tendon reflexes
  • Positive Babinski reflex

Osteosynthesis

Osteosynthesis is the term used for the reduction and fixation of a bone fracture and fixing them with rigid implants. Thus it points to a surgical procedure. Osteosynthesis aim to bring the fractured bone ends together and immobilize the fracture site while healing takes place.

Retropulsion

Retropulsion denotes a backward movement. In spinal fractures the term is used when a fractured fragment is pushed  backwards on to the cord. A retropulsed fragment potentially causes compromises of spinal canal space and indents over the cord causing compression.