Upper Limb Anatomy Quiz

Questions and Answers

What is the primary function of the rotator cuff muscles?

Flex the elbow

Enhance grip strength

Stabilize the shoulder and facilitate arm rotation (correct)

Control wrist movements

Which of the following muscles is NOT classified as a flexor muscle of the forearm?

Flexor digitorum superficialis

Flexor carpi ulnaris

Tricep brachii (correct)

Palmaris longus

Identify the correct bone configuration in the forearm.

Scapula and clavicle

Humerus and femur

Radius and ulna (correct)

Tibia and fibula

Which muscle is primarily responsible for extending the elbow?

<p>Tricep brachii</p> Signup and view all the answers

What is the role of the brachial plexus in the upper extremity?

<p>Supplies nerves to the upper limb</p> Signup and view all the answers

Study Notes

Upper Extremity Overview

Comprises the arm, forearm, wrist, and hand.

Arm

Extends from the glenoid cavity to the elbow.
Contains the humerus, the sole bone of the arm.
Muscles are grouped for shoulder movement:
- Flexor muscle (Anterior): Responsible for flexing the elbow, notably the biceps brachii.
- Extensor muscle (Posterior): Includes the triceps brachii, facilitating elbow extension.

Rotator Cuff Muscles

Consists of five key muscles:
- Deltoid
- Supraspinatus
- Infraspinatus
- Teres minor
- Subscapularis
Essential for arm rotation.

Posterior Part of the Arm

Houses the cephalic and basilic veins, important for venous drainage.
Contains the brachial plexus, a network of nerves supplying the arm.
The brachial artery is the major blood vessel supplying the arm.

Forearm

Extends from the elbow to the wrist.
Composed of two bones:
- Ulna (medial)
- Radius (lateral).

Forearm Muscles

Grouped into flexor and extensor muscles:
- Flexor muscles include:
  - Flexor carpi ulnaris
  - Flexor digitorum superficialis
  - Flexor carpi radialis
  - Palmaris longus
  - Pronator teres
  - Supinator
  - Pronator quadratus (not specifically mentioned but often included).

Description

Test your knowledge on the anatomy of the upper limb, including the structure and functions of the arm, forearm, wrist, and hand. This quiz also covers important muscle groups such as the flexors, extensors, and rotator cuff muscles. Challenge yourself and enhance your understanding of upper extremity anatomy.