muscle identification
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School
University of Tennessee, Martin *
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Course
710
Subject
Anatomy
Date
Dec 6, 2023
Type
docx
Pages
4
Uploaded by DukeWhale3793
1.
The Joints
1.
Define two functional classifications of joints?
-
Functional: determined by the degree of movement
ability of the joint.
-
Structural: determined by the type of connective tissue
and wether there is a cavity located at the joint
2.
Describe the key structural similarities between the ankle and
knee.
-
Both are synovial hinge joints
2.
Muscles of facial expression.
1.
Compare and contrast the functions of the Zygomaticus
major and Zygomaticus minor in relation to movement of the
mouth.
-
The Zygomaticus major originates from the lateral side
of the zygomatic bone while the minor originates from
the anterior side. They both movee the lip although in
different ways. The major lifts and pulles the corner of
the lip while the minor elevates the upper lip.
2.
Name two sphincter muscles of the face.
-
Orbicularis oris and Orbicularis oculi
3.
Muscles of the cheeks and mouth.
1.
Describe the Masseter muscles origin, insertion and action.
-
The Masseter originates on the zygomatic bone, the
insertion is on the lateral and angle ramus of the
mandible, and then elevates it.
2.
Which muscle compresses the cheeks and which cranial
nerve would play a role in this action?
-
The Buccinator muscle compresses the cheek and
cranial nerve Vll innervates.
4.
Muscles of Chewing
1.
Define the following movements in relation to chewing:
1.
Protrusion: moves the mandible anteriorly, lateral
pterygoing produces movement.
2.
Retraction: moves the mandible posteriorly, the
masseter produces movement.
3.
Elevation: moves the mandible superiorly towards the
upper teeth, medial pterygoid produces movement.
4.
Depression: moves the mandible inferiorly.
5.
Muscles of anterior abdominal wall
1.
Based on the information in the Draw it to know it tutorial,
describe a "sit-up" or crunch that would work both the Rectus
abdominus and the internal oblique?
-
Doing a half situp would work both of these areas
because the rectus abdominus would strain to keep
balance at that angle, rather than coming completely up
to a resting position.
2.
Which muscle compresses the abdomen and depresses the
ribs?
-
Transversus abdominus
6.
Muscles of Respiration
1.
Name three muscles used for inspiration (inhale)?
-
Diaphragm, anterior scalene, external intercostals.
2.
Where does the diaphragm insert?
Describe this insertion
structure.
-
Inserts into the central tendon, the diaphragm then
contracts expanding the thoracic cavity.
7.
Superficial muscles of the back
1.
This muscle is functional in adduction, extension, and
medially rotating the humerus along with depressing the
scapula.
Name the muscle?
-
Latissimus dorsi
2.
Which two muscles are named after a geometric shape?
-
Trapezius and rhomboideus
8.
Muscles of the Rotator Cuff
1.
Compare information from your reading and tutorials.
Which
two muscles listed in the Posterior scapula tutorial are part of
the rotator cuff?
-
Supraspinatus and infraspinatus
2.
Which plexus (nerve network) innervates the muscles of the
posterior scapula?
-
Brachial plexis
3.
Identify the muscles named for their tupe or cylindrical shape.
-
Orbicularis oris and Orbicularis oculi
9.
Thoracic muscles: Anterior
1.
This muscle flexes flexes, adducts, and medially rotates the
humerus.
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