Interchondral joints

These are joints located between the costal cartilages of the ribs.

Interchondral joints are synovial or partially synovial joints formed between the adjacent costal cartilages of the ribs, specifically between the 6th to 10th ribs. They allow for slight movement, which contributes to the expansion and contraction of the thoracic cavity during respiration. The connective tissue that holds these joints together can vary in structure, accommodating mobility as needed during breathing.

Terminologia Anatomica

articulationes interchondrales

System

Skeletal system

Function

Interchondral joints play a crucial role in the mechanics of breathing. During inhalation, the diaphragm contracts, and the rib cage expands, increasing the volume of the thoracic cavity. The slight flexibility provided by the interchondral joints allows the ribs to move upward and outward, facilitating lung expansion and enhancing the intake of air. This movement is essential for effective ventilation, ensuring that oxygen enters the lungs and carbon dioxide is expelled efficiently. The dynamic capability of these joints makes them integral to respiratory mechanics, enabling the vast changes in volume that occur within the thoracic cavity with each breath.

Location

Interchondral joints are specifically located in the thoracic region of the body, forming connections between the costal cartilages of the lower ribs. They are situated laterally within the rib cage, extending from the area just below the sternum to the lateral sides where the ribs curve around the torso. These joints can be found between the 6th and 10th ribs, where each costal cartilage meets its neighbor. Their position is vital as they contribute to the structural integrity and flexibility of the rib cage, allowing for the respiratory movements that occur during normal breathing.

Did You Know?

Interchondral joints allow for subtle movements that facilitate the expansion of the thoracic cavity.
In elderly individuals, these joints may undergo degenerative changes, leading to reduced flexibility and respiratory efficiency.
These joints are often overlooked, yet they play a significant role in the functionality of the rib cage during physical activities.