ANP 1106 Chapter Notes - Chapter 10: Extensor Digitorum Longus Muscle, Biceps, Quadratus Lumborum Muscle

• School: University of Ottawa
• Department: Anatomy and Physiology
• Course: ANP 1106
• Professor: Jackie Carnegie

Document Summary

Muscle fiber is a single muscle tissue cell; several different levels of ct wrapping: Endomysium fine layer of ct that surrounds each muscle fiber (cell) Muscle attachments most muscle span joints and are attached to bones in at least 2 places. Arrangement of fascicles all skeletal muscles have fascicles; 4 patterns: Parallel strap-like (sartorius) or fusiform (spindle-shaped muscle with expanded belly; biceps brachii) Pennate (feather like) unipennate (extensor digitorum longus), bipennate (rectus femoris), multipennate (deltoid) Convergent muscle is triangular or fan-shaped (pectoralis major) Circular concentric rings surround exterior openings and contract to close opening (orbicularis oris) Location of muscle bone or body region i. e temporalis, intercostal. Muscles of the head facial expression: insert into skin or other muscles, not bones; innervated by facial nerve. Epicranius main muscle of scalp, consists of frontalis (raise eyebrows, wrinkles forehead) and occipitalis (pulls scalp posteriorly) connected by epicranial aponeurosis.