Anatomical Concepts Related to Human Movement
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Transcript of Anatomical Concepts Related to Human Movement
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Anatomical Concepts Related to Human
Movement
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Course Content
I. Introduction to the Course
II. Biomechanical Concepts Related to Human Movement
III. Anatomical Concepts Related to Human Movement
IV. Applications in Human Movement
V. Functional Anatomy of Selected Joint Complexes
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Anatomical Concepts Related to Human Movement
A. The Skeletal System
B. The Muscular System
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The Skeletal System
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Levels of Structural Organization
Chem ical
Cell
Tissue
Organ
Organ System
Organism
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Chemicals & Cells
Chemical
Cell nucleus organelles cytosol cell membrane
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Tissues & Organs
Tissue epithelial muscle nerve connective
Organ
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Organ Systems
integumentary skeletal muscular nervous endocrine
cardiovascular lymphatic respiratory digestive urinary reproductive
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Function of Musculoskeletal System
General function is to cause or control movement, more specifically: Support
maintain upright posture Allow movement
body transport manipulate objects
Protect
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Overview of Musculoskeletal System
Musculoskeletal system operates like a machine Skeletal system provides structure Muscular system provides force
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The Skeletal System
1. General Structure & Function
2. Tissue Level Structure & Function
3. Organ Level Structure & Function
4. System Level Structure & Function
5. Injury to the Skeletal System
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The Skeletal System
1. General Structure & Function
2. Tissue Level Structure & Function
3. Organ Level Structure & Function
4. System Level Structure & Function
5. Injury to the Skeletal System
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General Structure
~206 bones>200 joints12-15% BWConnective tissueStructure varies
Bones &
Joints
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Axial Skeleton
~80 boneshead (29)thorax (51)
Bones singular, paired, & multiple
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Appendicular Skeleton
~126 bonesupper (32)lower (31)girdles
Bones multiple & paired
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General Function
1. Shape & supporting framework for other systems
2. Protection
3. Storage & production of minerals & RBCs
4. System of machines for transmission of forces
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The Skeletal System
1. General Structure & Function
2. Tissue Level Structure & Function
3. Organ Level Structure & Function
4. System Level Structure & Function
5. Injury to the Skeletal System
What is the primary type of tissue found in the skeletal system?
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Tissue Level of Skeletal System
Properties of connective tissue Structure & function of connective tissue Types of connective tissue
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Properties of Connective Tissue
Strength Load w/o damage
Stiffness Resistance to deformation
Extensibility Ability to stretch & deform
Elasticity Ability to regain original shape after deformation
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Tissue Properties - strengthL
oad
(N
)
Deformation (cm)
1
5
10
15
20
25
A
B C
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Tissue Properties - stiffnessL
oad
(N
)
Deformation (cm)
1
5
10
15
20
25
A
B C
1 2 3 4 5 6 7
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Tissue Properties - extensibilityL
oad
(N
)
Deformation (cm)
1
5
10
15
20
25
A
B C
1 2 3 4 5 6 7
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Tissue Level of Skeletal System
Properties of connective tissue Structure & function of connective tissue Types of connective tissue
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General Function of Connective Tissue
1. Mechanical support Bind cells together in tissues, organs, systems Support and hold organs in place Provide stability and shock absorption for joints Provide flexible links between bones Provide smooth articulating surfaces between bones Transmit muscle force
2. Intercellular exchange
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General Structure of Connective Tissue
Cellular Component Extracellular Matrix
Protein Fibers
collagen, elastin
Ground Substance
(Fluid)
Resident Cells
fibroblasts, osteocytes,
chondroblasts, etc.
Circulating Cells
lymphocytes, macrophages, etc.
synthesis &maintenance
defense &clean up
determines the functional
characteristics of the connective tissue
Distinguishes CT from other tissues
…blast – produce matrix…clast – resorb matrix…cyte – mature cell
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Elastin
random arrangement extensible – ultimate ~ 200% low tensile strength yellow fibers EX: rubber band
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Collagen
parallel (regular) arrangement ultimate ~ 10% high tensile strength white fibers EX: shoelace
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Tissue Level of Skeletal System
Properties of connective tissue Structure & function of connective tissue Types of connective tissue
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Types of Connective Tissue
Types of Connective Tissue
OrdinaryOrdinary SpecialSpecial
Irregular OrdinaryIrregular Ordinary Regular OrdinaryRegular Ordinary CartilageCartilage BoneBone
Regular CollagenousRegular Collagenous
Regular ElasticRegular Elastic
LooseLoose
AdiposeAdipose
Irregular CollagenousIrregular Collagenous
Irregular ElasticIrregular Elastic
•Number & type of cells•Proportion of collagen, elastin, & ground substance•Arrangement of protein fibers
•Bind cells•Mechanical links•Resist tensile loads
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Irregular Ordinary Connective Tissue
Structure: Elastin & collagen in
large GS Moderate strength &
elasticity
Function: Binds cells into tissues
and tissues into organs Provides supporting
framework for nerves, blood vessels, and lymph vessels
1) Loose
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Irregular Ordinary Connective Tissue
Structure: Random network of collagen & elastin with little GS Moderate elasticity & strength
Function: Padding around organs and joints Continuous layer beneath skin for insulation
2) Adipose
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Irregular Ordinary Connective Tissue
3) Irregular Collagenous
Structure: Few elastin fibers &
little GS Resists stretch in any
direction Function:
Forms epimysium, epineurium, perichondrium, periosteum, & capsule around kidneys, liver, & spleen
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Irregular Ordinary Connective Tissue
4) Irregular Elastic
Structure: Few collagen fibers &
moderate GS Stretches in many
directions Moderate strength
Function: Forms walls of arteries,
larger arterioles, trachea, bronchial tubes
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Regular Ordinary Connective Tissue
1) Regular elastic Elastin fiber bundles arranged parallel Moderate strength and extensibility in single
direction Elastic ligaments of the spine:
Ligamentum flavum, ligamentum nuchae
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Regular Ordinary Connective Tissue
2) Regular Collagenous
Collagen fiber bundles arranged parallel
Strong & inextensible Tendons, aponeuroses,
ligaments, joint capsules, retinacula
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Other Terminology
Fibrous tissue Elastic tissue
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Special Types of Connective Tissue
Cartilage Bone
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Cartilage Tissue General Structure
Highly specialized GS (proteoglycans + H20 = gel) General Mechanical Properties
Anisotropic Strong; resists all load conditions Moderate stiffness Good extensibility & elasticity
Types of Cartilage Tissue Hyaline (articular) joints, costal cartilage, trachea,
bronchial tubes, larynx, external nose Fibrocartilage articular discs, labrum, lining of grooves Elastic larynx, ear lobe, eustachian tube
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Bone Tissue
General Structure Collagen in hard, solid GS (bone salt)
General Mechanical Properties Anisotropic Strongest & stiffest Little elasticity & extensibility
Types of Bone Tissue Compact (cortical) bone more dense Trabecular (cancellous, spongy) bone
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Summary
The skeletal system forms one part of the musculoskeletal machine which makes movement of the human body possible.
To best understand human movement, the skeletal system should be studied at the cellular, tissue, organ, organ system, and organism level.
We have examined the tissue level of the skeletal system and better understand how the tissue level contributes to the overall function of the organism with regard to human movement.
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Summary
Connective tissue is the primary tissue of the skeletal system. It is the strongest and most elastic tissue in the body, which makes it most suitable for the functions performed by the skeletal system.
There are 8 types of connective tissue in the human body.
The unique function of the various types of connective tissue is determined by the structure of the tissue.