Muscles of the shoulder girdle

The tutorial explores the muscles of the shoulder girdle, focusing on their origins, insertions, innervations, and functions. It covers both posterior and anterior views, detailing muscles like the trapezius, rhomboid, sternocleidomastoid, omohyoid, subclavius, pectoralis minor, and serratus anterior. The tutorial concludes with a summary of the muscles' roles in supporting the shoulder and facilitating movement.

Which muscle is the largest in the shoulder girdle and is visible from a posterior view?

• Serratus Anterior

• Trapezius

• Pectoralis Minor

• Rhomboid Major

What is the primary nerve that innervates the trapezius muscle?

• Long Thoracic Nerve

• Subclavian Nerve

• Dorsal Scapular Nerve

• Accessory Nerve

The rhomboid major muscle originates from which vertebrae?

• C6 and C7

• T1 to T4

• 1st and 2nd ribs

• T5 to T12

Which muscle is known for having two heads and is easily palpable?

• Sternocleidomastoid

• Subclavius

• Pectoralis Minor

• Omohyoid

What is the function of the omohyoid muscle?

• Depresses and fixes the hyoid bone

• Elevates the first rib

• Stabilizes the clavicle

• Adducts the scapula

Which muscle is responsible for the active stabilization of the clavicle?

• Serratus Anterior

• Pectoralis Minor

• Rhomboid Minor

• Subclavius

The serratus anterior muscle is innervated by which nerve?

• Accessory Nerve

• Medial Pectoral Nerve

• Long Thoracic Nerve

• Dorsal Scapular Nerve