extention
The arm is engaged in a motion called flexion when moving from position A to position B. This involves reducing the angle between the bones of the arm at a joint, such as the elbow or shoulder.
To accurately answer your question about the Arm's movement from position B, I would need more context regarding the specific positions or actions involved. Generally, arm movements can involve flexion, extension, abduction, adduction, or rotation, depending on the transition between the positions. Please provide additional details about position B or the nature of the movement for a more precise response.
What arm?
High Arm in Endangered Spine - First Aid technique used when someone is unconcious - a recovery position - high arm technique limits movement of the spine by supporting the head
Starting from the anatomical position, abduction indicates the movement of an arm or leg away from the midline or midsagittal plane. Adduction indicates movement of an extremity toward the midline.
Bones will not cause the arm to be in a straight position, instead, muscle and tendons will cause the arm to be straight.
the wiper arms are on a splined shaft so you would have to remove the arm from the shaft and rotate and replace them farther to the left or right to get the position you want most arms are held with a clip device of some kind that is part of the arm its self
The brachialis is named for its location and function; the term "brachialis" is derived from the Latin word "brachium," which means "arm." This muscle is situated in the upper arm, beneath the biceps brachii, and is primarily responsible for elbow flexion. Its name reflects its role in arm movement and its anatomical position within the arm.
If the flexor is not able to contract, the arm would not be able to bend at the joint. Flexors are responsible for initiating movement by bringing body parts closer together, so the arm would likely remain in a straightened position.
when you bend your arm
The blood carries oxygen and nutriens throughout your body. In your case you had to hold your arm in wierd position and the blood couldn't flow into your arm what made your arm turn red/purple and go numb.
Which muscles? If all the muscle are clenched it will be perfectly still but that could be in any position depending on what position the arm was in ot start with.