Guide to Internet Resources
related to
Muscular System
Origins, Insertions, Actions and Innervations Explained
I Corporis
by Corporis
Duration: 4:15
Posted: Nov 9, 2018
Views > 26,000 (when accessed 9/8/20)
Covers: there are over 600 muscles in human body
skeletal muscle is one of three types of muscle
origin and insertion are labels based on motion
(NOT based on location such as proximal distal)
in general, insertion point moves towards origin
example: sternocleidomastoid
action, insertion, origin
example: pectoralis major
learning muscle innervation information
Deltoid muscle. Origin, insertion, actions
by Muscle and Motion
Duration: 1:09
Posted: Dec 6, 2016
Views > 79,000 (when accessed 9/8/20)
Covers: posterior deltoid origin: spine of scapula
middle deltoid origin: acromion
anterior deltoid origin: clavicle (lateral third)
insertion (of deltoid): deltoid tuberosity
action: deltoid: shoulder abduction
posterior deltoid: shoulder horizontal abduction, shoulder external rotation
anterior deltoid: shoulder flexion, shoulder horizontal adduction, shoulder internal rotation
deltoid
by Jeyron S
Duration: 1:47
Posted: Feb 29, 2012
Views > 32,000
Covers: deltoid - 3 groups of fibers
anterior deltoid - origin: lateral one third of clavicle, insertion: deltoid tuberosity of humerus, action: flex arm at the shoulder, also medially rotate arm, innervation: axillary nerve
middle deltoid - origin: acromion, insertion: deltoid tuberosity of humerus, action: abduct the arm, innervation: axillary nerve
posterior deltoid - origin: inferior border spine of scapula, insertion: deltoid tuberosity of humerus, action: extend arm at shoulder, also laterally rotate arm, innervated: axillary nerve
