Slide 1

Muscles : axial musculature Muse 2430 sp Lecture #11 6/27/12 Slide 2 Introduction The axial musculature arises on the axial skeleton. Positions the head and vertebral column Moves the rib cage Axial muscles do not play a role in the movement or stabilization of the pectoral or pelvic girdles or the limbs. Roughly 60 percent of the skeletal muscles in the body are axial muscles. Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 3 The Axial Musculature The axial muscles fall into four logical groups based on location and/or function. Muscles of the head and neck Facial expression Whistling Sucking Chewing Swallowing Contractions of the eye muscles Muscles of the vertebral column Oblique and rectus muscles Diaphragm Muscles of the pelvic floor Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 4 The Axial Musculature Figure 10.1Superficial Skeletal Muscles, Anterior View Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 5 The Axial Musculature Figure 10.1Superficial Skeletal Muscles, Anterior View Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 6 The Axial Musculature Figure 10.2Superficial Skeletal Muscles, Posterior View Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 7 The Axial Musculature Figure 10.2Superficial Skeletal Muscles, Posterior View Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 8 The Axial Musculature Muscles of the Head and Neck Can be subdivided into several groups: Muscles of facial expression Extraocular muscles Muscles of mastication Muscles of the tongue Muscles of the pharynx Anterior muscles of the neck Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 9 The Axial Musculature Figure 10.3 Muscles of the Head and Neck, Part I Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 10 The Axial Musculature Figure 10.3 Muscles of the Head and Neck, Part I Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 11 The Axial Musculature Figure 10.4Muscles of the Head and Neck, Part II Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 12 The Axial Musculature Figure 10.4Muscles of the Head and Neck, Part II Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 13 The Axial Musculature Figure 10.4Muscles of the Head and Neck, Part II Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 14 The Axial Musculature Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 15 The Axial Musculature Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 16 The Axial Musculature Figure 10.5Extraocular Muscles (Lateral Surface of Right Eye) Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 17 The Axial Musculature Figure 10.5Extra-ocular Muscles (Medial Surface of Right Eye) Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 18 The Axial Musculature Figure 10.5Extra-ocular Muscles (Anterior View of Right Eye) Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 19 The Axial Musculature Figure 10.5Extraocular Muscles (Anterior View of Right Orbit) Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 20 The Axial Musculature Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 21 The Axial Musculature Figure 10.6Muscles of Mastication (Lateral View) Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 22 The Axial Musculature Figure 10.6 Muscles of Mastication (Lateral View, Pterygoid Muscles Exposed) Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 23 The Axial Musculature Figure 10.7The Sphenomandibularis Muscle Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 24 The Axial Musculature Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 25 The Axial Musculature Figure 10.8Muscles of the Tongue Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 26 The Axial Musculature Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 27 The Axial Musculature Figure 10.9Muscles of the Pharynx (Lateral View) Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 28 The Axial Musculature Figure 10.9Muscles of the Pharynx (Midsagittal View) Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 29 The Axial Musculature Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 30 The Axial Musculature Figure 10.10Anterior Muscles of the Neck, Part I (Anterior View) Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 31 The Axial Musculature Figure 10.10Anterior Muscles of the Neck, Part I (Superior View) Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 32 The Axial Musculature Figure 10.11Anterior Muscles of the Neck, Part II Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 33 The Axial Musculature Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 34 The Axial Musculature Muscles of the Vertebral Column Back muscles form three distinct layers: Superficialmove the neck Intermediateextend the vertebral column Deepinterconnect vertebrae Extrinsic musclesthose in the superficial and intermediate layers Intrinsic (or true) musclesthose in the deepest layer; in turn, these intrinsic muscles are arranged in superficial, intermediate, and deep layers Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 35 The Axial Musculature Figure 10.12Muscles of the Vertebral Column, Posterior View of Superficial (Right) and Deeper (Left) Muscles Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 36 The Axial Musculature Figure 10.12Muscles of the Vertebral Column Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 37 The Axial Musculature Figure 10.12Muscles of the Vertebral Column Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 38 The Axial Musculature Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 39 The Axial Musculature Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 40 The Axial Musculature Oblique and Rectus Muscles The muscles of the oblique and rectus groups lie between the vertebral column and the ventral midline. The oblique muscles can compress underlying structures or rotate the vertebral column, depending on whether one or both sides are contracting. The rectus muscles are important flexors of the vertebral column, acting in opposition to the erector spinae. Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 41 The Axial Musculature Figure 10.13The Oblique and Rectus Muscles Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 42 The Axial Musculature Figure 10.13The Oblique and Rectus Muscles Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 43 The Axial Musculature Figure 10.14The Diaphragm Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 44 The Axial Musculature Figure 10.14The Diaphragm Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 45 The Axial Musculature Figure 10.14The Diaphragm Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 46 The Axial Musculature Figure 10.15An Inguinal Hernia Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 47 The Axial Musculature Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 48 The Axial Musculature Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 49 The Axial Musculature Muscles of the Perineum and the Pelvic Diaphragm Three main functions: Support the organs of the pelvic cavity Flex the joints of the sacrum and coccyx Control the movement of materials through the urethra and anus Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 50 The Axial Musculature Figure 10.16Muscles of the Pelvic Floor (Female) Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 51 The Axial Musculature Figure 10.16Muscles of the Pelvic Floor (Male) Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 52 The Axial Musculature Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Slide 53 The Axial Musculature Copyright 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings