Anatomy and Physiology, Sixth Edition

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Presentation transcript:

Anatomy and Physiology, Sixth Edition Rod R. Seeley Idaho State University Trent D. Stephens Idaho State University Philip Tate Phoenix College Chapter 10 Lecture Outline* *See PowerPoint Image Slides for all figures and tables pre-inserted into PowerPoint without notes. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

Muscular System Gross Anatomy Chapter 10 Muscular System Gross Anatomy

General Principles Tendons: Attach muscles to bones Muscles Aponeurosis: A very broad tendon Muscles Origin or head: Muscle end attached to more stationary of two bones Insertion: Muscle end attached to bone with greatest movement Belly: Largest portion of the muscle between origin and insertion Synergists: Muscles that work together to cause a movement Prime mover: Plays major role in accomplishing movement Agonist: Muscle causing an action when contracts Antagonist: A muscle working in opposition to agonist Fixators: Stabilize joint/s crossed by the prime mover

Muscle Shapes

Muscle Shapes

Nomenclature Muscles are named according to: Location: pectoralis gluteus, brachial Size: maximus, minimus, longus, brevis Shape: deltoid, quadratus, teres Orientation: rectus Origin and insertion: sternocleidomastoid, brachioradialis Number of heads: biceps, triceps Function: abductor, adductor, masseter

Muscle Movements Muscle contractions are a pull or force by relative positions of Lever: Rigid shaft or bone Fulcrum: Pivot point or joint Weight or resistance

Classes of Levers Class I Class II Class III Fulcrum between force and weight Seesaw or head movement Class II Weight is between fulcrum and pull Wheelbarrow, standing on toes Class III Pull located between fulcrum and weight Person using a shovel Most common

Muscle Anatomy: Anterior View

Muscle Anatomy: Posterior View

Muscles of the Neck

Muscles of Facial Expression

Muscles of Mastication

Muscles of Respiration

Muscles of the Abdominal Wall

Muscles of Pelvic Floor and Perineum

Muscles of the Arm

Muscles of the Forearm

Muscles of the Thigh

Muscles of the Leg

Muscles of the Leg

Muscles of the Foot

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