Introduction to the Musculoskeletal System Flashcards
Axial VS Appendicular
Axial surrounds CNS (brain and spinal cord)- includes skill, vertebrae, ribs, sternum, sacrum, and ONLY dorsal/posterior part of pelvis
Appendicular surround appendages- includes limbs, shoulder blades, hip bones in lower aspect
Bone Shape Classification
Long, Irregular, Flat, Short
What is Sesamoid
The sesamoid bone is a short bone found within the tendons
What are joints?
Articulation-joint connection between 2 bones
Types of joints
Fibrous, Cartilaginous, Synovial
FIbrous Joints
Dense connective tissue connecting bones in close contact
SUTURE bones in skull, GOMPHOSIS teeth in school, SYNDESMOSIS in forearm and leg
-generally, no movement
Cartilaginous Joints
Cartilage (hyaline, fibrocartilage) between bones
SYNCHONDROSIS- growth plate
SYMPHYSIS- intervertebral disc, pubic symphysis
Synovial Joints
Most common joints allowing free movement (PIC) 1. Articular cartilage 2. Synovial Cavity 3. Synovial fluid 4. Joint Capsule 5. Reinforcing ligaments 6. Nerves and blood vessels
ABduction
movement in coronal plane away from midline
ADduction
Moving toward midline in coronal plane
Supination VS Pronation
forearm, mandible
Supination: Twist at the elbow, rotating forward “hold soup and throw it away”
Pronation: Rotate JUST the Forarm
Circumduction
This is NOT rotation of limbs- its movement between abduction and adduction
Plantarflexion VS. Dorsiflexion
(ANKLE ONLY)
Plantarflexion: point toes down (like a ballerina)
Dorsiflexion: point toes upward
Inversion VS Eversion
(ANKLE ONLY)
Inversion: sole of the foot turns medially (when foot goes in and ankle goes out)–like supination
Eversion: when sole of foot goes outward (break ankle)–like potenation
Elevation VS Depression
Jaw: Elevation: close your mouth
Depression: open your mouth