Forearm Rotation
Forearm Rotation - Related Videos
08:05
Testing Tactile Masking between the Forearms
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Cited by 2 •
2016
Here we explore contralateral tactile masking between the forearms in which tactile detection thresholds are modulated by vibration applied to a remote site. The details of which remote sites have an effect can tell us about how the body is represented in the brain.
01:16
Muscles that Move the Forearm
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2024
The muscles that move the forearms can be divided into four groups: forearm flexors, forearm extensors, forearm pronators, and forearm supinators. The flexors and extensors act on the elbow joint, while the pronators and supinators act on the radioulnar joints. Forearm Flexors The biceps brachii, brachialis, and brachioradialis are forearm flexors. The biceps brachii is made up of two heads. Its long head originates at the supraglenoid tubercle of the scapula, whereas that of the short head is...
07:19
Simulating Fall-Induced Wrist Fractures Using a Cadaveric Human Forearm Specimen
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2026
Source:Anthony J. Yosick1,2, Christine Massie1, Emma Knapp2, Hani A. Awad1,2,31Department of Biomedical Engineering, University of Rochester, US2Center for Musculoskeletal Research, Department of Orthopedics, University of Rochester Medical Center, USA3Department of Orthopedics, University of Rochester Medical Center, USAThe video demonstrates fall-related wrist fractures using human cadaver forearms with varying bone densities. Specimens are standardized by removing upper soft tissue,...
05:56
Mental Rotation
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2023
Source: Laboratory of Jonathan Flombaum—Johns Hopkins University Visual mental imagery refers to the ability to conjure images in one’s mind’s eye. This allows people to process visual material above and beyond the constraints of a current point-of-view; for example, a person could imagine, using their mind’s eye, how something might look in a different color, or what it would look like if it were made from a different material or rotated and seen from a different perspective. Mental imagery...
07:48
Rotational Inertia
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2023
Source: Nicholas Timmons, Asantha Cooray, PhD, Department of Physics & Astronomy, School of Physical Sciences, University of California, Irvine, CA Inertia is the resistance of an object to being accelerated. In linear kinematics, this concept is directly related to the mass of an object. The more massive an object, the more force is required to accelerate that object. This is seen directly in Newton's second law, which states that force is equal to mass times acceleration. For rotation,...
FAQs
Movement is shared between the proximal and distal radioulnar joints rather than occurring at a single location. The radius rotates around the ulna while muscles generate movement and ligaments maintain alignment and stability. This coordinated arrangement allows the hand to be repositioned while limiting unwanted motion between the forearm bones.
The radius provides the rotating skeletal element, while the ulna serves as the bone around which that movement occurs. Muscles create the force needed for pronation and supination, and ligaments stabilize the joints during movement. Normal forearm rotation therefore depends on both mobility and coordinated support from these structures.
Pain or reduced movement may indicate dysfunction involving the radioulnar joints, radius, ulna, wrist, or elbow. Because rotation requires these regions to work together, clinicians interpret the location and severity of limitation alongside muscle and nerve function. This assessment helps narrow diagnostic considerations rather than treating reduced motion as an isolated finding.
A clinical assessment examines how well the patient can turn the hand and whether the movement causes pain or appears restricted. Clinicians relate these findings to joint mobility, muscle performance, and nerve function, while considering the radius, ulna, wrist, and elbow. The resulting pattern supports diagnosis and helps establish a baseline for follow-up.
Measurement is particularly useful when an injury or operation may have affected the radius, ulna, wrist, elbow, or their supporting tissues. Repeated assessment can show whether painful or restricted motion is improving during recovery. These findings help clinicians adjust treatment planning and rehabilitation according to the patient’s functional progress.
The amount of available movement, the presence of pain, and associated findings in muscle or nerve function provide clinically relevant information for planning care. Tracking these features helps distinguish ongoing limitation from recovery and indicates whether rehabilitation is restoring useful hand positioning. It also supplies an outcome measure after treatment or surgery.