Upper Limb Skeleton Anatomy

Long Bone Structure

• The bone exhibiting a long bone structure without a medullary cavity is the clavicle.

Pectoral Girdle Components

• The pectoral girdle consists of the clavicle and scapula, connecting the upper limb to the trunk.

Clavicle Articulation

• The medial end of the clavicle articulates with the sternum, facilitating stability of the shoulder girdle.

Subcutaneous Point of the Shoulder

• The acromion process of the scapula forms the subcutaneous point of the shoulder, serving as a landmark on the body.

Function of the Pectoral Girdle

• The pectoral girdle serves to support the upper limbs and provide a wide range of motion for arm movements.

Scapula's Finger-like Process

• The coracoid process of the scapula resembles a bent finger and assists in anchoring muscles.

Glenoid Cavity

• The glenoid cavity of the scapula forms a shallow, concave oval fossa that articulates with the head of the humerus, allowing for shoulder joint movement.

Largest Bone in the Upper Limb

• The humerus is the largest bone in the upper limb, supporting the arm and providing attachment points for muscles.

Deltoid Tuberosity Location

• The deltoid tuberosity is located on the lateral aspect of the humerus, serving as an attachment for the deltoid muscle.

Elbow Prominence

• The olecranon process of the ulna forms the prominence of the elbow, contributing to the elbow joint's structure.

Articulation with Humerus Trochlea

• The ulna articulates with the trochlea of the humerus, forming part of the elbow joint.

Radial Notch Location

• The radial notch is located on the ulna, allowing for the articulation with the head of the radius, facilitating forearm rotation.

Stabilizing Bone of the Forearm

• The ulna is considered the stabilizing bone of the forearm, supporting the forearm's structure.

Spiral (Radial) Groove Location

• The spiral (radial) groove is located on the posterior surface of the humerus, being an important landmark for muscle attachment.

Subscapular Fossa

• The subscapular fossa is a concave anterior surface of the scapula, serving as a site for muscle attachment (subscapularis muscle).

Articulation with Humerus Capitulum

• The head of the radius articulates with the capitulum of the humerus, contributing to the function of the elbow joint.

This quiz covers the bones of the upper limb skeleton, including the pectoral girdle, arm, forearm, wrist, and hand. It provides detailed information about the composition and functions of the bones in the upper limb.