Info

Muscle

Origin

Insertion

Action

Nerve Supply

Trapezius

Occipital bone and spines of cervical and thoracic vertebrae

Clavicle, spine, and acromion process of scapula

Rotates scapula; various fibers raise scapula, pull scapula medially, or pull scapula and shoulder downward

Accessory n.

Rhomboideus major

Spines of upper thoracic vertebrae

Medial border of scapula

Raises and adducts scapula

Dorsal scapular n.

Levator scapulae

Transverse processes of cervical vertebrae

Medial margin of scapula

Elevates scapula

Dorsal scapular and cervical nerves

Serratus anterior

Outer surfaces of upper ribs

Ventral surface of scapula

Pulls scapula anteriorly and downward

Long thoracic n.

Pectoralis minor

Sternal ends of upper ribs

Coracoid process of scapula

Pulls scapula forward and downward or raises ribs

Pectoral n.

Levator scapulae Supraspinatus Spine of scapula Deltoid Infraspinatus Teres minor Teres major

Major Blood Vessels Animals
Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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