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Muscles of the Neck Origin Insertion Action Sternocleidomastoid* Scalene Muscles* Splenius Muscles* Base of occipital Mastoid process 1st cervical- vertebra bone Mastoid process Middle scalene Splenius capitis Sternocleido- mastoid Anterion scalene Spinous processes of the vertebrae Posterior scalene Splenius cervicis (a) Anterior view, muscles that flex, laterally flex and rotate the head (b) Posterior view, deep back muscles that extend the head and neck, superficial layer Muscles that Move the Trunk Origin Insertion Action Erector Spinae, Iliocostalis group Erector Spinae, Longissimus group Erector Spinae, Spinalis group Quadratus Lumborum

Muscles of the Neck Origin Insertion Action Sternocleidomastoid* Scalene Muscles* Splenius Muscles* Base of occipital Mastoid process 1st cervical- vertebra bone Mastoid process Middle scalene Splenius capitis Sternocleido- mastoid Anterion scalene Spinous processes of the vertebrae Posterior scalene Splenius cervicis (a) Anterior view, muscles that flex, laterally flex and rotate the head (b) Posterior view, deep back muscles that extend the head and neck, superficial layer Muscles that Move the Trunk Origin Insertion Action Erector Spinae, Iliocostalis group Erector Spinae, Longissimus group Erector Spinae, Spinalis group Quadratus Lumborum

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Muscles of the Neck Origin Insertion Action Sternocleidomastoid* Scalene Muscles* Splenius Muscles* Base of occipital bone Mastoid process 1st cervical vertebra Mastoid process -Middle scalene Splenius сapitis Sternocleido- mastoid - Anterior Spinous processes of the vertebrae scalene Posterior scalene Splenius cervicis (a) Anterior view, muscles that flex, laterally flex and rotate the head (b) Posterior view, deep back muscles that extend the head and neck, superficial layer Muscles that Move the Trunk Origin Insertion Action Erector Spinae, Iliocostalis group Erector Spinae, Longissimus group Erector Spinae, Spinalis group Quadratus Lumborum Abdominal muscles (see below)
Transcribed Image Text:Muscles of the Neck Origin Insertion Action Sternocleidomastoid* Scalene Muscles* Splenius Muscles* Base of occipital bone Mastoid process 1st cervical vertebra Mastoid process -Middle scalene Splenius сapitis Sternocleido- mastoid - Anterior Spinous processes of the vertebrae scalene Posterior scalene Splenius cervicis (a) Anterior view, muscles that flex, laterally flex and rotate the head (b) Posterior view, deep back muscles that extend the head and neck, superficial layer Muscles that Move the Trunk Origin Insertion Action Erector Spinae, Iliocostalis group Erector Spinae, Longissimus group Erector Spinae, Spinalis group Quadratus Lumborum Abdominal muscles (see below)
Expert Solution
Introduction

The muscles of the neck are muscles that cover the neck and they are responsible for the movement of the neck. They consist of: 

  • anterior
  • lateral
  • posterior

The trunk is the central part of the body. The head and the limbs are attached to the truck. The trunk muscles depending on their location are divided into: 

  • anterolateral muscles of the trunk
  • posterior muscles of the trunk

Functions of the truck muscles are:

  • contribute to the protection of the thoracic and abdominal viscera
  •  assist essential body activities such as movement, breathing, defecation and micturition.
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