Mastoid process and occipital bone Costal cartilages of inferior ribs Muscle Skin of the orbital area and eyelids Closes eye, pulls skin around the eye Orbicularis oculi Quadratus lumborum Rectus abdominis Splenius capitis Origin Iliac crest and connective tissue of lumbar region Flexes the trunk compresses abdominal cavity Spinous processes of cervical vertebrae and connective tissue of the posterior neck Insertion Extends the head, rotates the head to the same side as the muscle that is contracting Rib 12 and transverses processes of lumbar vertbrae Action Orbital portions of the " frontal bone and maxilla Superior aspects of pubic bones Extend the vertebral column; maintain posture laterally flex the vertebral column when contracted on one side only
Mastoid process and occipital bone Costal cartilages of inferior ribs Muscle Skin of the orbital area and eyelids Closes eye, pulls skin around the eye Orbicularis oculi Quadratus lumborum Rectus abdominis Splenius capitis Origin Iliac crest and connective tissue of lumbar region Flexes the trunk compresses abdominal cavity Spinous processes of cervical vertebrae and connective tissue of the posterior neck Insertion Extends the head, rotates the head to the same side as the muscle that is contracting Rib 12 and transverses processes of lumbar vertbrae Action Orbital portions of the " frontal bone and maxilla Superior aspects of pubic bones Extend the vertebral column; maintain posture laterally flex the vertebral column when contracted on one side only
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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Transcribed Image Text:Mastoid process and
occipital bone
Costal cartilages
of inferior ribs
Muscle
Skin of the orbital area
and eyelids
Closes eye, pulls skin
around the eye
Orbicularis oculi
Quadratus lumborum
Rectus abdominis
Splenius capitis
Origin
Iliac crest and connective
tissue of lumbar region
Flexes the trunk
compresses
abdominal cavity
Spinous processes of
cervical vertebrae and
connective tissue of the
posterior neck
Insertion
Extends the head, rotates
the head to the same side
as the muscle that is
contracting
Rib 12 and transverses
processes of lumbar
vertbrae
Action
Orbital portions of the "
frontal bone and maxilla
Superior aspects
of pubic bones
Extend the vertebral column;
maintain posture laterally flex
the vertebral column when
contracted on one side only
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