Origin Insertion Action Lab
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School
Inver Hills Community College *
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Course
2201
Subject
Anatomy
Date
Dec 6, 2023
Type
docx
Pages
6
Uploaded by PresidentProtonOtter68
Learning Objectives:
After completing the following laboratory exercises, students will be able to:
Identify two or three major muscles acting on each of six joints.
Define origin and insertion.
Identify the precise location of the origin(s) and insertion(s) for fourteen muscles.
Determine a primary action for fourteen muscles affecting six joints.
Visualize the relationship between origin, insertion, and action.
Learner Outcomes:
Students will understand the relationships between the origin and insertion of a muscle and its action at
a joint.
Materials you will need for this lab:
Mini Study Skeleton (from your lab kit)
Play-doh or modelling clay (purchase on your own)
Camera
Scrap of paper with your name and the date written on in (must appear in all photos)
ANATOMY AND PHYSIOLOGY LAB: ORIGINS, INSERTIONS, AND ACTIONS OF MUSCLES
Task 1: Play-doh Muscle Modelling
Six joints appear in the table on the next page.
For each joint, I have selected 2 or 3 major muscles that
act on the joint.
It is important to note that there are MANY more muscles that act on each joint.
See
the tables in chapter 10 for actions of each muscle, categorized by the part of the body the muscle acts
on.
You will notice that many muscles have more than one action, as each muscle can assist in a variety
of movements depending on which other muscles it is acting with. For the purposes of this lab, for each
joint I have selected 2 or 3 main muscles that oppose each other in movement.
For each muscle, I have
only listed one of its many movements. You will identify the muscle, its origin(s), its insertion(s), and its
primary action.
FOR EACH MUSCLE:
1.
MUSCLE: Locate the muscle listed, using diagrams from your text (Chapter 10) or other sources.
2.
ORIGIN: For each muscle, use diagrams from your text (Chapter 7) or other sources to find the
bone feature(s) that forms the origin(s) of the muscle.
The origin of a muscle is the bone feature
attachment for the less moveable end of the muscle.
The origin can be called the “fixed end.”
Identify the exact bone features on your study skeleton.
3.
INSERTION: For each muscle, use diagrams from your text (Chapter 7) or other sources to find
the bone feature(s) that forms the insertions of the muscle.
The insertion of a muscle is the
bone feature attachment for the more moveable end of the muscle.
The insertion can be called
the “mobile end.” Identify the exact bone features on your study skeleton.
4.
PLAY-DOH MUSCLE MODEL: Create each muscle out of play-doh or modelling clay to fit onto
your study skeleton.
Using the EXACT locations for the origin and insertion of each muscle, you
will attach your play-doh muscle to the model.
You will not receive credit for this lab unless the
play-doh muscle is attached to the EXACT origin and insertion.
Take time to carefully model your
play-doh so that it is the right size and shape to connect to the bones at its origin and insertion.
5.
PHOTO: Photograph your play-doh muscle so that the image shows precise origin and insertion.
Be sure to include a scrap of paper with your name and date in the photo.
You will paste all
photos into the end of this document.
6.
ACTION: Pull on the play-doh muscle by holding the origin (fixed end) still and pulling on the
play-doh muscle so that the insertion (mobile end) moves.
You will see the action, or movement
produced, when the muscle contracts.
The study skeleton is moveable, so you should be able to
see the primary action of each muscle at each joint.
7.
Remove the play-doh muscle from your study skeleton.
8.
Repeat for each muscle.
9.
Paste your photos at the end of this document and submit in the appropriate D2L assignment
submission dropbox as your Origin/Insertion/Action Lab.
ANATOMY AND PHYSIOLOGY LAB: ORIGINS, INSERTIONS, AND ACTIONS OF MUSCLES
JOINT
MUSCLE
ORIGIN
INSERTION
PRIMARY ACTION
Jaw/ Temporomandibular
Masseter
Zygomatic arch
Ramus of mandible
Elevate mandible
Temporalis
Temporal Fossa
Coronoid process of
the mandible
Elevate mandible
Shoulder/ Humeroscapular
Deltoid
Clavicle
Scapula: spine and
acromion process
Deltoid tuberosity
Abducts shoulder
Latissimus dorsi
Spinous process of
vertebrae (T7-L5),
sacrum, iliac crest
Humerus:
intertubercular groove
(between greater and
lesser tubercle)
Adducts shoulder
Elbow/
Humeroulnar and Humeroradial
Biceps brachii
Long head: Scapula-
supraglenoid tubercle
(superior side of glenoid
cavity)
Short Head: Scapula-
coracoid process
Radial tuberosity
Flexion of elbow
Brachialis
Humerus: anterior
surface
Ulna: ulnar tuberosity
and coronoid process
of ulna
Flexion of elbow
Triceps brachii
Long head: Scapula –
infraglenoid tubercle
(inferior side of glenoid
cavity)
Lateral head: humerus –
lateral and posterior
surface
Medial head: humerus –
posterior surface
Ulna: olecranon
process
Extension of
elbow
Hip/
Coxal
Iliopsoas
Iliacus portion: Iliac
fossa (along and below
the iliac crest)
Psoas major portions:
Vertebrae (T12-L5)
Femur: lesser
trochanter
Flexion of hip
Gluteus
maximus
Posterior surface of
ilium, sacrum, and
coccyx
Gluteal tuberosity of
femur
Extension of hip
ANATOMY AND PHYSIOLOGY LAB: ORIGINS, INSERTIONS, AND ACTIONS OF MUSCLES
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