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Q: Which of the following types of joint is found in the small joints of the vertebrae?

Gliding joint. ***Gliding joint*** - The **facet joints** (zygapophyseal joints) between the vertebrae are classified as synovial **gliding joints**, allowing limited, flat-surface movements. - These joints enable the spine to **flex, extend, and rotate** by allowing the vertebral bodies to slide past one another. *Hinge joint* - **Hinge joints** allow movement primarily in one plane, like the **elbow** or **knee**, and are characterized by a cylindrical bone end fitting into a trough-shaped surface. - This type of joint would not permit the complex range of motion required in the vertebral column. *Saddle joint* - **Saddle joints** allow movements similar to a horse saddle, providing a wide range of motion but preventing rotation, as seen in the **thumb's carpometacarpal joint**. - Their specific bone congruence is not found in the vertebral joints. *Condyloid joint* - **Condyloid joints** allow movement in two planes (flexion/extension, adduction/abduction, circumduction) but not full rotation, such as the **radiocarpal joint** of the wrist. - The vertebrae do not articulate in a convex-into-concave manner typical of condyloid joints.

Q: Boundary of the triangle of auscultation is not formed by:

Serratus anterior. ***Serratus anterior*** - The **serratus anterior muscle** is located on the lateral aspect of the thorax, forming the medial wall of the axilla and extending to the midaxillary line. - It does not directly form a boundary of the **triangle of auscultation**; its location is too anterior and lateral to contribute to this posterior thoracic landmark. *Scapula* - The **medial border of the scapula** forms the inferolateral boundary of the triangle of auscultation. - This specific orientation allows for a thinner muscular layer over the intercostal spaces when the arm is abducted and flexed. *Trapezius* - The **lateral border of the trapezius muscle** forms the superomedial boundary of the triangle of auscultation. - This muscle extends from the skull and vertebral column to the scapula, contributing to the triangle's superior margin. *Latissimus dorsi* - The **superior border of the latissimus dorsi muscle** forms the inferomedial boundary of the triangle of auscultation. - This broad muscle of the back defines the lower edge of this triangular region.

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Vertebral Column

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Spinal Cord and Meninges

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Back Muscles and Fasciae

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Vertebral Joints and Ligaments

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Vasculature of the Back

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Innervation of the Back

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Clinical Aspects of Back Disorders

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Applied Anatomy of the Back

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Surface Anatomy of the Back

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Development of the Vertebral Column

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