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HUMAN ANATOMY Fifth Edition Chapter 1 Lecture Copyright © 2005 Pearson Education, Inc., publishing as Benjamin Cummings Chapter 10 Lecture Chapter 10 The.

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Presentation on theme: "HUMAN ANATOMY Fifth Edition Chapter 1 Lecture Copyright © 2005 Pearson Education, Inc., publishing as Benjamin Cummings Chapter 10 Lecture Chapter 10 The."— Presentation transcript:

1 HUMAN ANATOMY Fifth Edition Chapter 1 Lecture Copyright © 2005 Pearson Education, Inc., publishing as Benjamin Cummings Chapter 10 Lecture Chapter 10 The Muscular System: Axial Musculature Frederic Martini Michael Timmons Robert Tallitsch

2 Introduction The axial musculature arises on the axial skeleton. –It positions the head and vertebral column. –It moves the rib cage. –It does not play a role in the movement or stabilization of the pectoral or pelvic girdles or the limbs. Roughly 60% of the skeletal muscles in the body are axial muscles.

3 Sucking Chewing Swallowing Contractions of the eye muscles Introduction The axial muscles fall into four groups based on location and/or function: –Muscles of the head and neck: Laughing Talking Frowning Smiling Whistling –Muscles of the vertebral column –Oblique and rectus muscles: diaphragm –Muscles of the pelvic floor

4 Figure 10.1 Anterior MusclesFigure 10.2 Posterior Muscles Superficial Skeletal Muscles

5 Muscles of the Head and Neck The muscles of the head and neck can be subdivided into several groups. –Muscles of facial expression –Extra-ocular muscles –Muscles of mastication –Muscles of the tongue –Muscles of the pharynx –Anterior muscles of the neck

6 Figure 10.3a Anterior MusclesFigure 10.4a Lateral Muscles Muscles of Facial Expression

7 Figure 10.5a Lateral, Right EyeFigure 10.5b Medial, Right eye Extra-ocular Muscles

8 Figure 10.5c Anterior, Right EyeFigure 10.5d Anterior, Right Orbit Extra-ocular Muscles

9 Figure 10.6a Lateral MusclesFigure 10.6b Deep Lateral Muscles Muscles of Mastication

10 Figure 10.8 Muscles of the Tongue Muscles of the Tongue

11 Figure 10.9a Lateral ViewFigure 10.9b Midsagittal View Muscles of the Pharynx

12 Figure 10.10a Anterior MusclesFigure 10.10b Superior View Anterior Muscles of the Neck

13 PLAY The Head and Neck Muscles of the Head and Neck Summary of the head and neck muscles

14 Muscles of the Vertebral Column The muscles of the back form three distinct layers: –Superficial: move the neck –Intermediate: extend the vertebral column –Deep: interconnect vertebrae

15 Figure 10.12a Superficial and Intermediate Muscles Muscles of the Vertebral Column: Superficial and Intermediate Layers

16 PLAY The Erector Spinae Muscles Erector Spinae Summary of the erector spinae muscles

17 Figure 10.12b Intervertebral Muscles Muscles of the Vertebral Column: Deep Layer

18 Figure 10.12c Anterior Vertebral Muscles Muscles of the Vertebral Column: Spinal Flexors

19 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.

20 Figure 10.13a Anterior ViewFigure 10.13b Horizontal Section Oblique and Rectus Muscles

21 Figure 10.14a Inferior View Oblique and Rectus Muscles: The Diaphragm

22 Figure 10.14b Superior View Oblique and Rectus Muscles: The Diaphragm

23 Muscles of the Pelvic Floor Muscles of the pelvic floor have 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

24 Figure 10.15a Female Muscles of the Pelvic Floor

25 Figure 10.15b Male Muscles of the Pelvic Floor


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