Lesson 4B; upper extremity joints

what type of joint is the Temporomandibular Joint (TMJ)

hinge/planar

what defines the Temporomandibular Joint (TMJ)

condylar process of the mandible and mondibular fossa and articular tubercle of temporal bone

what movements occur at the TMJ

depression/ elevation and protraction/retraction of the jaw

what are clinical or key features of the TMJ

only moveable joint in the skull

what joint is this

Temporomandibular Joint (TMJ)

Identify the three ligaments in the TMJ

blue - lateral ligament

pink - stylomandibular ligament

green - sphenomandibular ligament

what type of joint is the Glenohumeral joint

ball and socket

what defines the Glenohumeral joint

head of the humerus and the glenoid cavity of the scapula

what movements occur at the Glenohumeral joint

flexxion/extension, abduction/adduction, medial/lateral rotation, circumduction

what are the clinical or key features of the Glenohumeral joint

GH and AC joints, many stabilizing ligaments

which joint is this

Shoulder (Glenohumeral) Joint

what ligament is this

coracohumeral ligament

what ligament is this

coracoacromial ligament

what ligament is this

acromioclavicular ligament

what ligament is this

coracoclavicular ligament

what ligament is this

glenohumeral ligaments

what type of joint is the Humeroulnar joint

hinge

what defines the Humeroulnar joint

trochlea of the humerus, the trochlear notch of the ulna, and the head of the radius

what movements occur at the Humeroulnar joint

flexion/extension of the forearm

what are clinical or key features of the Humeroulnar joint

radial annular ligament holds radius in place, collateral ligaments maintain joint

what joint does this depict

Elbow (Humeroulnar) Joint

what three ligaments does this depict

blue = Radial annular ligament

pink = Radial collateral ligament

green = Ulnar collateral ligament

what are the 4 joints of the hand (in order of proximal to distal)

1. Intercarpal joints

2. Carpometacarpal (CMC)

3. Metacarpophalangeal (MCP)

4. Interphalangeal (IP)

what is the movement of the Intercarpal joints

gliding

what is the movement of the Carpometacarpal (CMC) joints

gliding

what is the movement/characteristics of the Metacarpophalangeal (MCP) joints

• condyloid

• knuckles

• flexion/extension

• abduction/adduction

what is the movement of the Interphalangeal (IP) joints

• hinge

• flexion/extension

what are charasteristics of the flexor retinaculum

• Also referred to as the transverse carpal ligament

• Attaches from the hook of hamate and pisiform (medially) to the tubercle of the trapezium and tuberosity of the scaphoid (laterally)

• Forms the roof of the carpal tunnel

what are characteristics of the carpal tunnel

• Located on anterior surface of wrist

• Contents of tunnel are contained by the flexor retinaculum

• Anatomical structures of the carpal tunnel:

• Median nerve

• Finger flexors

• Flexor pollicis longus