Anatomy-Muscular System Skeletal Muscle Characteristics & Function Anatomy-Muscular System November 1, 2017

Introduction How many skeletal muscles can you name? What are the characteristics of skeletal muscles Functions?

Objectives Students will be able to: Identify skeletal muscle origin & insertion List the ways we name of skeletal muscles

Skeletal Muscles One of the main characteristics of Skeletal muscles is it ATTACHES to bone. Skeletal Muscles ORIGINATE on some portion of a bone and INSERT on another

Skeletal Muscle Attachments Origin Most proximal attachment Attached to least mobile bone Shorter tendon Muscle fibers closer to attachment First part of name Insertion Most distal attachment Attached to most mobile bone Longer tendon Muscle fibers farther from attachment Last part of name

Naming Skeletal Muscles Action or Function Name or part of name indicates function Flexor Flexor Hallucis Longus Extensor Extensor Hallucis Longus

Naming Skeletal Muscles Direction of fibers Relative to anatomical planes External Oblique Internal Oblique

Naming Skeletal Muscles Location Tibialis Anterior Tibialis Posterior Number of Division Biceps Brachii Triceps Brachii

Naming Skeletal Muscles Shape Geometric shapes Deltoid Triangular (Delta) Size Large v small Gluteus Maximus Gluteus Minimus Pectoralis Major Pectoralis Minor

Naming Skeletal Muscles Points of Attachments Origin = first part of name Insertion = last part of name Brachioradialis Origin – brachium (arm) Insertion – radius