What is the spiral groove of humerus?
The radial sulcus ( also known as the musculospiral groove, radial groove, or spiral groove) is a broad but shallow oblique depression for the radial nerve and deep brachial artery. It is located on the center of the lateral border of the humerus bone.
What passes through spiral groove?
the shallow groove that passes around the shaft of the humerus; it lies between the humeral attachments of the lateral and medial heads of the triceps brachii; the radial nerve and deep brachial artery course within the groove.
Which nerve runs in the spiral groove of the humerus?
radial nerve
Originating from the posterior cord, the radial nerve winds along the spiral groove of the humerus, where it is most commonly injured. The radial nerve innervates the triceps, brachioradialis, and the wrist and finger extensors. The nerve supplies sensation to the posterior arm and part of the dorsum of hand.
What is the rounded end of the humerus called?
It connects the scapula and the two bones of the lower arm, the radius and ulna, and consists of three sections. The humeral upper extremity consists of a rounded head, a narrow neck, and two short processes (tubercles, sometimes called tuberosities).
What is the spiral groove around the shaft of a screw called?
The spiral groove around the shaft of a screw is called the. threads.
Why is it important to have spiral grooves in groove type bushings?
Spiral groove bearings (also known as Rifle bearings) are self-acting (journal and thrust), or hydrodynamic bearings used to reduce friction and wear without the use of pressurized lubricants. They have this ability due to special patterns of grooves. For this reason, they are also contactless bearings.
What is the bone marking of the humerus?
| Location | Marking |
|---|---|
| Large projection located lateral to head | Greater tubercle |
| Lateral to the humeral head on anterior surface | Lesser tubercle |
| Groove located between the greater and lesser tubercles | Intertubercular sulcus (groove) |
| Roughened area located on the lateral aspect of the shaft of the humerus | Deltoid tuberosity |
What causes a spiral fracture pattern in the humerus?
You may develop a spiral fracture pattern in the humerus due to some twisting injuries. You develop it in the shaft of the humerus when you lock your lower arm or have it trapped in machinery while the body rotates.
What is the difference between proximal and shaft humerus fractures?
A proximal humerus fracture usually occurs close to the shoulder joint and can be located at different levels with different fracture patterns: simple or comminuted. A humerus shaft fracture, on the other hand, is one that is localized at the mid portion of the upper arm. What causes a humerus fracture?
What does the mid-shaft region of the humerus look like?
The mid-shaft region of the humerus is the long, thin part of the bone. The top part is cylindrical in shape and as it runs down towards the elbow it becomes narrower and more prism shaped. The back surface of the shaft of humerus is larger than the front.
What are the treatment options for a humerus shaft fracture?
Mobilization with physical therapy is begun immediately following surgery. A humerus shaft fracture may be treated with or without surgery, depending on the fracture pattern and associated injuries (i.e., nerve injury or open fracture).
