Wichtige Muskeln der oberen Extremität

This tutorial provides an overview of the muscles in the upper extremity, focusing on their location and function. It covers the shoulder joint muscles, including the rotator cuff and deltoid, the upper arm muscles like the biceps and triceps, the forearm muscles divided into flexors and extensors, and the hand muscles categorized into thenar, hypothenar, and interossei groups. The tutorial emphasizes the importance of understanding muscle names and locations to deduce their functions.

Which muscle is responsible for the abduction of the arm at the shoulder joint?

• Supraspinatus

• Subscapularis

• Infraspinatus

• Teres Minor

What is the primary function of the deltoid muscle's anterior part?

• Extension and external rotation

• Flexion and internal rotation

• Abduction

• Adduction

Which muscle is known as the strongest flexor of the arm?

• Biceps brachii

• Triceps brachii

• Coracobrachialis

• Brachialis

What is the function of the long head of the triceps brachii?

• Abduction of the arm

• Flexion of the elbow

• Internal rotation of the shoulder

• Extension of the shoulder

Which muscle is a strong pronator of the forearm?

• Extensor carpi ulnaris

• Supinator

• Pronator teres

• Flexor carpi radialis

What is the primary action of the flexor digitorum profundus?

• Extension of the wrist

• Flexion of the distal interphalangeal joints

• Pronation of the forearm

• Abduction of the fingers

Which muscle group is responsible for the opposition of the thumb?

• Interossei muscles

• Hypothenar muscles

• Thenar muscles

• Lumbrical muscles

What is the function of the dorsal interossei muscles?

• Extension of the thumb

• Flexion of the wrist

• Abduction of the fingers

• Adduction of the fingers

Which muscle is not always present in the population?

• Palmaris longus

• Brachioradialis

• Extensor digitorum

• Flexor carpi ulnaris

What is the main takeaway about the naming of skeletal muscles?

• They are named after famous scientists

• They are named randomly

• Their names are based on their color

• Their names often indicate their function