What are the bones of the forearm?
Ulna and Radius
Important landmarks of each bone include the olecranon, coronoid process, and radial notch for the ulna, and the head, neck, and radial tuberosity for the radius.
What are the eight bones of the wrist?
- Scaphoid
- Lunate
- Triquetrum
- Pisiform
- Trapezium
- Trapezoid
- Capitate
- Hamate
The wrist is composed of 8 bones.
How many bones are there in the wrist and hand combined?
27 bones
This includes 8 wrist bones, 5 metacarpals, and 14 phalanges.
What type of joint is the humeroulnar joint?
Hinge
This is one of the articulations of the elbow.
What are the joint types found in the elbow?
- Humeroulnar joint
- Humeroradial joint
- Proximal Radioulnar joint
The elbow has two articulations and is classified based on the type of movement allowed.
What ligaments are associated with the elbow joint?
- Annular
- Ulnar Collateral
- Radial Collateral
These ligaments provide stability to the elbow joint.
What is the origin of the Biceps Brachii?
- Supraglenoid tubercle
- Coracoid process
The Biceps Brachii has two origins, one from the supraglenoid tubercle and one from the coracoid process.
What action does the Biceps Brachii perform?
Flexion at elbow and shoulder
The Biceps Brachii is primarily known for its role in flexing the elbow.
What is the action of the Triceps Brachii?
Elbow extension
The Triceps Brachii is responsible for extending the elbow joint.
What is the function of the Pronator Teres?
Pronates forearm and hand
This muscle also assists in flexion at the elbow.
What are the origins of the Flexor Carpi Radialis?
Medial epicondyle of humerus
This muscle originates from the medial epicondyle of the humerus.
What is the insertion point of the Flexor Digitorum Superficialis?
Bases of middle phalanges of digits 2-5
This muscle flexes at proximal interphalangeal, metacarpophalangeal, and wrist joints.
What is the action of the Extensor Carpi Radialis Longus?
Extension and abduction of wrist
This muscle aids in extending and abducting the wrist.
Fill in the blank: The _______ is a joint type between the distal aspect of the ulna and the triquetrum.
articular disk
This structure helps facilitate movement and stability in the wrist joint.
What are the three types of joints in the wrist?
- Radiocarpal (condyloid)
- Intercarpal (gliding)
- Carpometacarpal (saddle for thumb)
These joints allow for various movements of the wrist and hand.
What type of joint is the Metacarpophalangeal joint?
Condyloid
This joint allows for flexion, extension, and some degree of rotation.
What ligaments support the radiocarpal joint?
- Radial collateral
- Ulnar collateral
- Palmer radiocarpal
These ligaments provide stability to the wrist.
What is the action of the Extensor Pollicis Longus?
Extension at joints of thumb
This muscle also aids in wrist abduction.
