Musculoskeletal Anatomy Flashcards
What bone classification do the femur and phalanges belong to?
Long bones
What bone classification do the carpals and tarsals belong to?
Short bones
What bone classification do the ribs, frontal, parietal and temporal bones belong to?
Flat bones
What bone classification do the vertebra belong to?
Irregular
What bone classification do the intratendinous bones belong to?
Sesamoid
What is the bone that is first to start ossifying and last to finish ossification?
Clavicle
What joint classification is immobile?
Synarthrosis
What type of joint is a synarthrosis?
Fibrous
What type of joint is semi-mobile?
Amphiarthrosis
What type of joint is a amphiarthrosis?
Cartilaginous
What type of joint is mobile?
Diarthrosis
What type of joint is a diarthrosis?
Synovial
What are the three types of fibrous joints?
Synostosis (suture), Syndesmosis (interosseous membranes), and Gomphosis (tooth and socket
What are the two types of cartilaginous joints?
Synchondrosis (primary cartilage), Symphysis (secondary cartilage)
What is a planar joint?
Gliding
What is a ginglymus joint?
Hinge
What is a trochoid joint?
Pivot
What is a condylar joint?
Ellipsoid
What is a sellar joint?
Saddle
What is a spheroidal joint?
Ball and socket
What midline joints are not secondary cartilaginous joints?
Median atlanto-axial and interparietal
All articular joint surfaces of synovial joints are covered by what?
Hyaline cartilage
What synovial joints are exceptions to having hyaline cartilage?
Temporomandibular, Sternoclavicular, and Acromioclavicular
What lines the inside of the fibrous joint capsule?
Synovial membrane
What type of cell makes up the synovium?
Plump cells
What type of synovial cells are macrophages?
Type A synoviocytes
What type of synovial cell secretes synovial fluid?
Type B synoviocytes
What is Hilton’s law?
The nerve that supplies the muscle that acts on a joint also supplies the joint and an area of skin over the joint?
What are the central canals of bones?
Haversian canals with blood vessels
What connects Haversian canals?
Volkmann’s canals
What surrounds Haversion canals?
Concentric lamellae
Lamellae are composed of what?
Lacunae
Lacunae are connected by what?
Canaliculi
What bone cells synthesize bone?
Osteoblasts
What bone cells reabsorb and remodel bone?
Osteoclasts
The outer layer of cartilage is called what?
Perichondrium
What is the perichondrium mainly composed of?
Glycosaminoglycans and proteoglycans with chondrocytes
What precedes chondrocytes?
Chondroblasts
Is cartilage innervated?
No
Does cartilage have direct blood supply?
No
What type of cartilage is most abundant?
Hyaline
What is hyaline cartilage made of?
Type II collagen
What is elastic cartilage made of?
Type II collagen and elastin
What is fibrocartilage made of?
Compact Type I collage fibers
What type of muscle has no cross striatiion, spindle-shaped cells, and a central nucleus?
Smooth muscle
What type of muscle has cross striations, and elongated peripheral nuclei?
Skeletal muscle
What type of muscle has cross striations, branches, intercalated discs, and a central nucleus?
Cardiac muscle
Individual muscle fibers are surrounded by what connective tissue?
Endomysium
A bundle of fibers (fascicle) is surrounded by what connective tissue?
Perimysium
A dense connective tissue that surrounds the entire muscle is called what?
Epimysium
What muscle arrangement is thick in the middle and tapered at each end?
Fusiform
What muscle is arrangement is uniform width with parallel fascicles?
Parallel
What muscle arrangement is fan shaped with a broad origin?
Triangular
What muscle arrangement is feather shaped?
Pennate
What muscle arrangement forms rings around certain body openings?
Circular
What type of joint is the temporomandibular joint?
Atypical synovial
What is the classification of the TMJ?
Compound hinge and gliding
What allows the TMJ to be resistant to damage and can regenerate?
Fibrocartilage
What separates the lower and upper compartment of the TMJ?
An intra-articular disc
What bones are involved in the temperomandibular joint?
Condyle of the mandible, Mandibular fossa, and Articular eminence of the temporal bone
What are the ranges of motion in the TMJ?
Elevation, depression, protraction, retraction and side-side
What muscles act on elevation of the TMJ?
Temporalis, Masseter, Medial Pterygoid
What muscles act in depression of the TMJ?
Mylohyoid, Digastric, Lateral pterygoid
What muscles act in protration of the TMJ?
Lateral pterygoid, anterior temporalis, superficial fibers of masseter
What muscles act in retraction of the TMJ?
Posterior part of the temporalis, deep part of the masseter
What muscles act in the side-side motion of the TMJ?
Alternating pterygoids
What innervates the TMJ?
Auriculotemporal, deep temporal, and masseteric branches of CN V (mandibular division)
What type of joint is the glenohumeral joint?
Synovial
What classification of synovial joint is the glenohumeral joint?
Ball and socket/Spheroidal
What bones make up the glenohumeral joint?
Glenoid fossa and head of the humerus
What muscles act in flexion of the glenohumeral joint?
Pec major, Anterior deltoids
What muscles act in extension of the glenohumeral joint?
Latissimus dorsi, Teres major, posterior fibers of Deltoid