Muscular System
Muscles of the human body - actions, attachments, and locations, and nerve supply. Looking for Quizzes? Click Here
Most read articles
Pectoralis Major Muscle – Attachment, Action & Innervation
Pectoralis major is a thick, fan-shaped muscle contributing to the thoracobrachial motion. It consists of a clavicular part and a sternal part, both converging to a flat tendon that inserts on the humerus. It’s innervated by both medial and lateral pectoral nerves.
Biceps Brachii – Attachments, Action & Innervation
Biceps brachii is one of the main muscles of the upper arm which acts on both the shoulder joint and the elbow joint. It derives its name from the fact that it consists of two parts (heads), both innervated by the musculocutaneous nerve.
Latissimus Dorsi Muscle – Attachments, Action & Innervation
Latissimus Dorsi is one of four muscles responsible for the thoracobrachial motion. It is large, flat and triangular in shape originating from large parts of the lumbar region and lower thorax to insert on the humerus through a narrow tendon.
Deltoid Muscle – Anterior and Middle Heads
The Deltoid muscle (derived its name from the Greek letter delta) is a large, triangular muscle occupying the upper arm and the shoulder giving it this rounded shape. The deltoid consists three sets of fibers: anterior, middle, and posterior.
Frontalis Muscle – Attachments, Actions & Innervation
The frontalis Muscle (Insertion, Origin, Actions & Innervations); explained beautifully in an illustrated and interactive way.
Supraspinatus Muscle – Attachments, Actions & Innervation
Supraspinatus is a small muscle of the upper arm. It’s one of the four muscles that make up the rotator cuff. It arises from the supraspinatus fossa to eventually inserts on the greater tubercle of the humerus.
Trapezius Muscle
An interactive demonstration of the Trapezius Muscle (Insertion, Origin, Actions & Innervations) featuring the iconic GBS illustrations.
Teres Major Muscle – Attachments, Action & Innervation
Teres major is a thick and ovoid muscle in the upper arm. Despite their similar names, Teres major has different actions and innervation from the Teres minor. It’s mainly responsible for the medial rotation of the arm and it also contributes to static posture and arm-swinging.
Gluteus Maximus – Attachments, Actions & Innervation
An interactive tutorial featuring the (origin, insertion, innervation, and actions) of Gluteus Maximus featuring GBS iconic illustrations and animations.
Subscapularis Muscle – Attachments, Action & Innervation
The subscapularis is a triangular muscle that fills the subscapular fossa. The Subscapularis muscle is one of the rotator cuff muscles, helping to stabilize the head of the humerus in the glenoid fossa during shoulder movements.