mariam joints
DESCRIPTION
joints,fkTRANSCRIPT
Slide 1
Joints and bones of the head
2JointsJoints and their classificationbony jointsfibrous jointscartilaginous jointsSynovial joints
3Joints and Their ClassificationArthrology = study of the jointsKinesiology = study of musculoskeletal movementClassified by freedom of movementdiarthrosis (freely movable)amphiarthrosis (slightly movable)synarthrosis (little or no movement)Classified how adjacent bones are joined fibrous, cartilaginous, bony or synovial4Bony Joint (Synostosis)Gap between two bones ossifiesfrontal and mandibular bones in infantscranial sutures in elderlyattachment of first rib and sternumCan occur in either fibrous or cartilaginous joint
5Fibrous Joints (Synarthrosis)Collagen fibers span the space between bonessutures, gomphoses and syndesmoses
6Immovable fibrous jointsbind skull bones together
Lap - overlapping beveled edges
Plane - straight, nonoverlapping edgespalatine processes of the maxillaeFibrous Joint -- Sutures
7Types of Sutures
8Fibrous Joint -- GomphosesAttachment of a tooth to its socket Held in place by fibrous periodontal ligamentcollagen fibers attach tooth to jawboneSome movement while chewing
9First-Class LeverHas fulcrum in the middle between effort and resistanceAtlantooccipital joint lies between the muscles on the back of the neck and the weight of the faceloss of muscle tone occurs when you nod off in class
10Second-Class LeverResistance between fulcrum and effortResistance from the muscle tone of the temporalis muscle lies between the jaw joint and the pull of the diagastric muscle on the chin as it opens the mouth quickly
Temporomandibular Joint
TMJ syndrome caused by malocclusion & stressClicking sounds, headaches, vertigo, pain, or tinnitus