Exam 2 Flashcards
3 Types of Synarthrotic Joints
Fibrous - Suture, Gomphosis
Cartilaginous - Synchondrosis
2 Types of Amphiarthrotic Joints
Fibrous - Syndesmosis
Cartilaginous - Symphysis
3 Joint Movements
Synarthrotic - No movement
Amphiarthrotic - Some movement
Diarthrotic - Full motion
3 Fibrous Joints
Sutures
Gomphosis
Syndesmosis
2 Cartilaginous Joints
Synchondrosis
Symphysis
6 Types of Synovial Joints
Plane/Gliding
Hinge
Pivot
Condyloid/Ellipsoid
Saddle
Ball-and-Socket
2 Examples of Ball-and-Socket Joints
Shoulder - humerus & scapula
Hip - femur & pelvis
Ex: of Saddle Joint
Trapezium & Metatarsal 1
Ex: Ellipsoid Joint
Metatarsals & Proximal Phalanges
Ex: Pivot Joint
Ephiphysis of Ulna/Radius
3 Examples of Hinge Joint
Temporal Bone & Mandible
Elbow
Knee
Ex: Gliding/Plane Joint
Between Carpals &
Between Tarsals
Ex: Gomphosis
Teeth & Alveolar Processes
2 Examples of Syndesmosis
Between Diaphysis of Ulna & Radius
Between Diaphysis of Tibia & Fibula
Examples of Sutures:
Sagittal Suture - divides head in L&R halves
Squamous Suture - above ear
Coronal Suture - between frontal & parietal bones
Lamboid Suture - between Occipital & Parietal bones
Articular Cartilage
Cartilage pad that covers the surface of a bone inside a joint cavity
Synovial Cavity
Fluid filled chamber in a diarthrotic joint
Synovial Fluid
Substance secreted by synovial membrane that lubricates the joint
Articular Capsule
Dense collagen fiber sleeve that surrounds a joint and provides protection & stabilization
Components of Articular Capsule
Fibrous Capsule
Synovial Membrane
Synovial Membrane is in what anatomical direction to the Fibrous Capsule?
Deep
Extracapsular Ligaments “Screw Mechanism” at the Hip Allow What Motion?
Resist What Motion?
Allow Anterior Motion (Flexion)
Resist Posterior Motion (Extension)
What are Bursae?
Where do they form?
What do they do?
Bursae are small, fluid-filled pockets in connective tissue.
They form where a tendon or ligament rubs against other tissues.
They reduce friction & act as a shock absorber
What are Menisci?
What do they do?
Where are they located?
- Fibrous Cartilage pads between opposing surfaces in a joint
- Allow for variations in the shapes of articular surfaces & restrict movements at the joint. *Make pockets that make knee more stable
- In the joint capsule
What is a Tendon Sheath?
Protective covering for the tendon
What is injured in the Unhappy Triad?
MCL
Medial Meniscus
ACL
Hip Joint Movements
Flexion/Extension
Adduction/Abduction
Circumduction
Rotation
Articular Capsule of Hip Joint Location
Extends from Lateral & Inferior surfaces of Pelvic Girdle
to
Intertrochanteric Line & Interochanteric Crest of Femur
5 Ligaments of Hip Capsule
Iliofemoral
Pubofemoral
Ischiofemoral
Transverse Acetabular
Ligament of the Femoral Head
Purpose of Articular Surface of Acetabulum
Stabilizes Hip Joint
Creates a Deep Bony Pocket for Femur
Bony Matrix Composition
Calcium
Collagen
Osteogenic Cells
Stem cells that give rise to osteoblasts
Osteocytes
Mature bone cells. Occupy the lacunae. Directs the release and deposition of calcium.
Central Canal
contains the blood vessels that supply the osteon. Surrounded by concentric lamellae
Perforating Canal
Extends perpendicular to the surface. Delivers blood to osteons deeper in the bone and the medullary cavity
Concentric Lamellae
Cylindrical aligned parallel to the long axis of the bone. Surround the central canal.
Interstitial Lamellae
Fill the spaces between the osteons of compact bone
Canaliculi
interconnect lacunae of an osteon and form a branching network that reaches the central canal. Carry nutrients to the osteon.
Trabeculae
Arrangement of spongy bone into parallel structs or thick branching plates.
Outer Circumferential Lamellae
forms border between osteons and periosteum layers of bone
Inner Circumferential Lamellae
forms border between compact bone and spongy bone trabeculae
Flat Bones
Most Skull Bones
Ribs
Sternum
Scapula
Long Bones
Humerus
Radius
Ulna
Femur
Tibia
Fibula
Short Bones
Wrist Bones
Ankle Bones
Epiphysis
Stores Red Bone Marrow
Spongy Bone
Diaphysis
Stores Yellow Bone Marrow
Compact Bone
Medullary Cavity
Periosteum Composition
Outer Layer - Dense Fibrous Connective Tissue
Inner Layer - Osteoprogenitor Cells
Periosteum’s 4 Functions
- Isolate & Protect Bone
- Attachment for circulatory and nervous supply
- Bone growth & repair
- Attaches bone to connective tissue network of deep fascia
Endosteum
Cellular lining of the medullary cavity. Covers trabeculae of spongy bone & lines inner surfaces of canals.
Intramembranous Ossification Model
Dense Regular & Irregular Connective Tissue
Endochondral Ossification Model
Hyaline Cartilage
Endochondral Ossification Makes What Kind of Bones
Long Bones
Ossification Center for Intramembranous
Group of Osteoblasts
5 Steps for Intramembranous Ossification
- Group of Osteoblasts differentiate from Mesenchyme & form Ossification Center
- Osteoblasts secrete Calcium to convert CT to bone tissue
- Ossification centers grow and fuse to make the trebeculae of spongy bone tissue
- Outer osteoblasts polish the bone to create compact bone on the outside.
- Leftover model turns into the periosteum of the bone
Steps for Endochondral Ossification
- Osteoblasts differentiate from the Mesenchyme and form a bone collar within the Hyaline Cartilage
- Collar starves cartilage. Dying Cartilage secretes calcium.
- Blood vessels invade Primary Ossification Center & deliver osteoblasts & clasts.
- Blasts build & Clasts destroy bone to create the medullary cavity
- Secondary Ossification Center form in Epiphysis of Bone
- The Epiphysis fills with spongy bone. Articular cartilage forms around the outside & an epiphysial plate separates the epihysis and diaphysis
How do hormonal changes at puberty affect bone growth?
- Create sexual differences, esp. in the angle of the pubic bone.
- Closes the Epiphyseal Plate
Blood Vessel that pierces Diaphysis
Nutrient Vessel
Longitudinal Bone Growth
- Happens at Epiphyseal Plate
- Cartilage grows & pushes epihysis further along
- Cartilage gets replaced by bone
Appositional Bone Growth - thicker
- Outer Circum. Lamellae grow ridges around periosteal artery
- Ridges Meet & Surround Artery
- Ridges Fuse & New Concentric Lamellae form
- Outer Lamellae becomes Concnetric lamellae
- Periosteum becomes Endosteum
Metaphyseal Vessels
supply blood to the inner diaphyseal surface of each epiphyseal cartilage, where bone is replacing cartilage
Other Calcium Needs
- Muscular, Nervous, Kidneys, pretty much everything
Tarsal Bones
from distal to proximal and medial to lateral
Medial, Intermediate, Lateral Cuneiform
Cuboid
Navicular
Tallus
Calcaneous
Fibular Landmarks
Head
Lateral Malleolus
Tibia Landmarks
Medial & lateral condyle
Intercondylar Eminence (posterior)
Tibial Tuberosity (anterior)
Anterior Crest/Margin
Medial Malleolus
Posterior Landmarks of the Femur
Intertrochanteric Crest
Gluteal Tuberosity
Linea Aspera
Intercondylar Fossa
Anterior Landmarks of the Femur
Intertrochanteric Line
Patellar Surface
Landmarks of the Femur without ant/pos direction
Fovea for ligament of head (capitis)
Femoral head
Neck
Greater Trochanter
Lesser Trochanter
Medial & Lateral Epicondyles