Identify the bone in the diagram below
The Correct Answer is ["Scaphoid bone"]
The carpal bones, also known as the wrist bones, are a group of eight small bones located in the wrist joint.
They are arranged in two rows of four bones each, with the rows separated by a space known as the carpal tunnel.
The carpal bones are held together by ligaments, and their shape and arrangement allow for a wide range of wrist movements.
The names of the carpal bones, from the proximal row to the distal row, are the scaphoid, lunate, triquetrum, and pisiform, and the trapezium, trapezoid, capitate, and hamate.
Each bone has a unique shape and surface features that allow it to articulate with adjacent bones, forming a complex network of joints that are important for wrist and hand movements.
The carpal bones are important because they provide stability to the wrist joint, allowing for precise movements of the hand and fingers.
They also help to transfer forces from the hand to the forearm, and vice versa.
Injuries to the carpal bones can result in wrist pain, instability, and decreased function of the hand and fingers.
Additionally, the arrangement of the carpal bones can affect the function of the median nerve, which runs through the carpal tunnel.
Compression or irritation of this nerve can result in carpal tunnel syndrome, a condition characterized by pain, numbness, and tingling in the hand and fingers.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
The thumb has three joints: the carpometacarpal (CMC) joint, the metacarpophalangeal (MP) joint, and the interphalangeal (IP) joint.
The CMC joint is a saddle type of joint that allows the thumb to move in multiple directions. A saddle joint has two concave surfaces that fit together like a rider on a horse.
Choice A is incorrect because hinge joints allow only flexion and extension movements, such as the IP joints of the thumb.
Choice B is incorrect because condylar joints have an oval-shaped surface that articulates with a shallow cavity, such as the MP joint of the thumb.
Choice D is incorrect because ball and socket joints have a spherical head that fits into a cup-like socket, such as the shoulder or hip joints.
Correct Answer is ["Posterior sacral foramina"]
Explanation
The posterior sacral foramina are openings located on the posterior aspect of the sacrum bone, which is part of the pelvis.
They are paired structures that allow the sacral nerves and blood vessels to pass through and exit the sacrum.
There are typically four pairs of posterior sacral foramina, located at the lateral margins of the sacrum.
These foramina are important for the transmission of nerve signals and blood supply to the lower limbs and pelvic organs.
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