Muscle Anatomy and Function

The video tutorial by Dr. Ayah covers the seven criteria used by anatomists to name skeletal muscles. These criteria include the direction of muscle fibers, shape, location, action, number of origins, relative size, and the location of origin and insertion. Each criterion is explained with examples, such as the orbicularis oculi for fiber direction and the trapezius for shape. The tutorial emphasizes understanding these criteria to comprehend how muscles are named based on their characteristics and functions.

Which muscle is named based on its circular fiber direction?

• Orbicularis oculi

• Rectus abdominis

• Trapezius

• Deltoid

What shape does the deltoid muscle resemble?

• A triangle

• A rhombus

• A circle

• A square

Where is the supraspinatus muscle located?

• On the supraspinous fossa of the scapula

• On the occipital bone

• On the temporal bone

• On the frontal bone

What action does the pronator teres muscle perform?

• Pronates the forearm

• Supinates the forearm

• Flexes the wrist

• Extends the fingers

How many heads does the biceps brachii muscle have?

• Two

• Four

• Three

• One

What does 'maximus' indicate about a muscle's size?

• Medium

• Largest

• Shortest

• Smallest

Which muscle is named for its long size?

• Fibularis brevis

• Gluteus maximus

• Gluteus minimus

• Fibularis longus

What are the origins of the sternocleidomastoid muscle?

• Sternum and clavicle

• Hyoid and sternum

• Temporal bone and occipital bone

• Frontal bone and temporal bone

Which muscle is named based on both its action and size?

• Adductor longus

• Trapezius

• Pectoralis major

• Deltoid

What does 'pectoralis' refer to in muscle naming?

• The arm region

• The chest region

• The leg region

• The back region