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Related Concept Videos

Knee Joint01:23

Knee Joint

3.6K
The knee joint is the most complicated joint in the body. It consists of three articulations– two tibiofemoral and one patellofemoral. As is characteristic of synovial joints, the knee joint has a thin articular capsule that partially surrounds this joint cavity. Additionally, several ligaments, muscles, and cartilaginous structures support the movement of the knee.
A total of seven ligaments support the knee joint. The patellar ligament, which is also attached to the quadriceps femoris...
3.6K
Bones of the Lower Limb: Femur and Patella01:16

Bones of the Lower Limb: Femur and Patella

9.0K
The femur is the body's longest and strongest bone spanning the thigh region. Its head articulates with the acetabulum of the hip bone to form the hip joint. A minor indentation on the medial side of the femoral head, called the fovea capitis, serves as the site of attachment for the ligament of the head of the femur. This weak ligament spans the femur and acetabulum and supports the hip joint. The narrowed region below the head is the neck of the femur. The inclination angle between the...
9.0K
Ankle Joint01:10

Ankle Joint

3.4K
The ankle is formed by the talocrural joint (crural = leg). It consists of the articulations between the talus bone of the foot and the distal ends of the tibia and fibula of the leg. The superior aspect of the talus bone is square-shaped and has three areas of articulation. The top of the talus articulates with the inferior tibia. This is the portion of the ankle joint that carries the body weight between the leg and foot. The sides of the talus are firmly held in position by the articulations...
3.4K
Muscles that Move the Leg01:23

Muscles that Move the Leg

6.0K
The movement of the legs is facilitated by numerous muscles located within the anterior, medial, and posterior compartments of the thigh.
Anterior Compartment
The quadriceps femoris, the most visible muscle of the anterior compartment, is integral for leg extension and thigh flexion. It is formed by merging four distinct muscles — the vastus lateralis, vastus medialis, vastus intermedius, and rectus femoris. The quadriceps tendon, a shared tendon of the four quadriceps muscles, is affixed...
6.0K
Pain01:20

Pain

1.7K
Pain serves as a critical warning signal that alerts the body to potential or actual harm. When mechanical pressure on the skin is intense, such as from a sharp pinch, the sensation transitions from touch to pain. Similarly, extreme temperatures, like a hot pot handle, convert the sensation of heat into pain. Pain can also result from overstimulation of other senses, such as blinding light, loud noise, or the intense heat from habañero peppers. This ability to sense pain is essential for...
1.7K
Blood and Nerve Supply to the Bones01:29

Blood and Nerve Supply to the Bones

14.5K
Bones are dynamic organs that require a rich supply of oxygen and nutrients. Around 5% to 10% of the cardiac output supplies blood to the bones. A typical long bone has three main sources: the nutrient artery, the metaphyseal and epiphyseal arteries, and the periosteal arteries.
Nutrient Artery
The nutrient artery is the main blood vessel that enters the diaphysis via the nutrient foramen. While most long bones have only one nutrient foramen, large bones, such as the femur, may have two. This...
14.5K

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Related Experiment Video

Updated: Mar 18, 2026

Author Spotlight: Fu's Subcutaneous Needling for Knee Osteoarthritis Pain
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Author Spotlight: Fu's Subcutaneous Needling for Knee Osteoarthritis Pain

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[A young man with a painful knee].

G H M Vervoort1, S Postma, B Meesters

  • 1Zuyderland Medisch Centrum, Heerlen.

Nederlands Tijdschrift Voor Geneeskunde
|June 30, 2016
PubMed
Summary

A young man

Area of Science:

  • Orthopedic Surgery
  • Radiology

Background:

  • Proximal tibiofibular joint (PTFJ) dislocations are rare knee injuries.
  • Prompt diagnosis and management are crucial for optimal outcomes.

Observation:

  • A 23-year-old male presented with left knee injury.
  • Computed tomography (CT) confirmed a proximal tibiofibular joint dislocation.

Findings:

  • Successful closed reduction of the PTFJ dislocation was performed under procedural sedation and analgesia.
  • The knee was managed with a pressure bandage and immobilization for two weeks.

Implications:

  • This case highlights the importance of considering PTFJ dislocation in knee injuries.
  • Successful non-operative management can be achieved with prompt reduction and immobilization.

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