KINE 326: Elbow and Forearm Information ( Exam 5 )

- Humerus

- Radius

- Ulna

What are the three bones of the Forearm Region?

- Humeroulnar

- Humeroradial

- Proximal Radioulnar

- Distal Radioulnar

What are the four joints of the Forearm Region?

- Trochlea

- Capitulum

- Lateral Epicondyle

- Medial Epicondyles

- Lateral and Medial Supracondylar Ridges

What are the Bony Landmarks on the Distal End of the Humerus?

Humeroulnar Joint

What is the Main Elbow-Forearm Joint?

Lateral Epicondyle

What is the common origin for Wrist Extensors?

Medial Epicondyles

What is the common origin for Wrist Flexor Muscles?

Lateral and Medial Supra-epicondylar Ridges

What is between the shaft and epicondyle, where bone starts to widen?

- Coronoid Fossa

- Radial Fossa

What is located on the Anterior Surface of the Humerus?

Coronoid Fossa

During Elbow Flexion the coronoid process of ulna lodges into this fossa ?

Radial Fossa

During Elbow Flexion, the head of radius lodges into this fossa?

Olecranon Fossa

What is located on the Posterior Side of the Humerus?

Olecranon Fossa

During Extension, the Olecranon Process of the ulna lodges into this fossa?

Coronoid Fossa

What fossa is this?

Radial Fossa

What fossa is this?

Olecranon Fossa

What fossa is this?

- Head

- Neck

- Radial Tuberosity

- Radial Styloid Process

- Ulnar Notch

What are the Bony Landmarks of the Radius?

- Olecranon Process

- Trochlear Notch

- Coronoid Process

- Ulnar Tuberosity

- Radial Notch

- Supinator Crest

- Ulnar Head

- Ulnar Styloid Process

What are the Bony Landmarks of the Ulna?

Humeroulnar Joint

What is the true elbow joint?

- Humeral Medial Condyle ( Trochlea )

- Ulnar Trochlear Notch

What parts articulate to form the Humeroulnar Joint?

Synovial Hinge Joint

What type of joint is the Humeroulnar Joint?

1 Degree of Freedom

How many degrees of freedom are possible in the Humeroulnar Joint?

- Flexion

- Extension

What actions occur in the 1 Degree of Freedom in the Humeroulnar Joint?

- Humeral Lateral Condyle ( capitulum )

- Radial Head

What things articulate to form Humeroradial Joint?

No True Motion

What motion happens in the Humeroradial Joint?

- Radial Head

- Radial Notch of Ulna

What articulates to create Proximal Radioulnar Joint?

Pivot Synovial Joint

What type of joint is Proximal Radioulnar Joint?

- Supination

- Pronation

What are the movements in the Proximal Radioulnar Joint?

Between Ulnar Head and Ulnar Notch of Radius

Where is the Distal Radioulnar Joint located?

Pivot Synovial Joint

What type of joint is the Distal Radioulnar Joint?

- Supination

- Pronation

What are the movements for the Distal Radioulnar Joint?

Valgus

Medial Collateral Ligamentous Complex ( MCLC ) prevents ( Valgus / Varus ) stress.

Varus

Lateral Collateral Ligamentous Complex ( LCLC ) prevents ( Valgus / Varus ) stress.

Capsular Joint

What surrounds all three proximal joints?

Humerus

What bone is this?

Ulna

What bone is this?

Radius

What bone is this?

Capitulum

What is this?

Trochlea

What is this?

Articulation of Two Bones

How do you control ROM for Humeroulnar Joint?

Supination

What movement is this?

Pronation

What movement is this?

Side to Side Movement

What is the purpose of a Ligament in the Elbow Joint?

- Medial Collateral Ligamentous Complex ( MCLC )

- Lateral Collateral Ligamentous Complex ( LCLC )

What are the stability structures of the Elbow Complex?

- Oblique Cord

- Interosseous Membrane

- Triangular Fibrocartilage Complex ( TFCC )

What are the stability structures of the Radio-Ulnar Joint?

Medial Collateral Ligamentous Complex

What is this?

Anterior

Which component of the MCLC is at the Medial Epicondyle to Medial Aspect of Coronoid Process of Ulna?

Anterior

What is the Primary Valgus Stabilizer in the Ulnar/Medial Collateral Ligamentous Complex (UCLC/MCLC)?

Anterior

What is most commonly injured in the Ulnar/Medial Collateral Ligamentous Complex (UCLC/MCLC)?

Posterior

Which component of the MCLC is located at the Medial Epicondyle to Medial Border of Olecranon Process of Ulna?

Radial Collateral Ligament ( RCL )

What is the Primary Varus Stabilizer in the Lateral Collateral Ligamentous Complex (LCLC )?

Oblique / Transverse

Which component of the MCLC is between coronoid process and olecranon process?

Anterior

Which part of the MCLC is the Primary Valgus Stabilizer?

LCLC

Is the ( MCLC / LCLC ) the Varus Stabilizer?

- Annular Ligament

- Radial Collateral Ligament

- Lateral Ulnar Collateral Ligament

What are the components of the Lateral Collateral Ligamentous Complex?

Annular Ligament

Which component of the LCLC runs from the two ends of radial notch (ulna) and incircles radius?

Radial Collateral Ligament

Which component of the LCLC runs between lateral epicondyle to annular ligament?

Lateral Ulnar Collateral Ligament (LUCL)

Which component of the LCLC runs from the lateral epicondyle, blending with fibers from the annular ligament (superficially) and attached at supinator crest?

Radial Collateral Ligament

Which component of the LCLC is the Primary Varus Stabilizer?

Lateral Collateral Ligamentous Complex

What is this?

To keep Radius and Ulna aligned

What is the purpose of the Interosseous Membrane?

- Fibrocartilaginous Articular Disc

- Radioulnar Ligaments

- Ulnocarpal Collateral Ligament

What are the parts of the Triangular Fibrocartilage Complex ( TFCC )?

- Function as Meniscus of Wrist

- Load Transmission across Ulnocarpal Joint and partially load absorbing

- Stabilized the Distal Radioulnar Joint during Rotation

What is the function of the TFCC?

Transfers the Forces in the Wrist to the Elbow

What is the purpose of all three TFCC structures working together?