Muscle Functions and Actions

The video provides a comprehensive review of muscle models used at San Jacinto College, covering facial, torso, arm, and leg muscles. It details the anatomical features and functions of each muscle group, offering insights into their locations and roles in the human body. The tutorial is structured to enhance understanding of muscle anatomy through visual and descriptive explanations.

Which muscle is responsible for closing the eyelids?

• Zygomatic major

• Mentalis

• Orbicularis oculi

• Frontalis

What is the primary function of the pectoralis major muscle?

• Flexion of the elbow

• Adduction of the arm

• Rotation of the head

• Extension of the knee

Which muscle is located above the scapular spine?

• Deltoid

• Supraspinatus

• Teres minor

• Infraspinatus

What is the role of the biceps brachii muscle?

• Adduction of the arm

• Abduction of the arm

• Flexion of the forearm

• Extension of the forearm

Which muscle is located on the radial side of the forearm?

• Flexor carpi ulnaris

• Brachioradialis

• Palmaris longus

• Extensor digitorum

Which muscle is known as the 'tailor's muscle'?

• Rectus femoris

• Sartorius

• Iliopsoas

• Vastus medialis

What is the primary action of the gluteus maximus?

• Adduction of the thigh

• Abduction of the thigh

• Extension of the hip

• Flexion of the hip

Which muscle is primarily responsible for knee extension?

• Vastus lateralis

• Biceps femoris

• Gracilis

• Sartorius

What is the function of the tibialis anterior muscle?

• Eversion of the foot

• Dorsiflexion of the foot

• Plantar flexion of the foot

• Inversion of the foot

What is the main action of the gastrocnemius muscle?

• Flexion of the knee

• Extension of the knee

• Plantar flexion of the foot

• Dorsiflexion of the foot