Cross Sectional Anatomy I Chapter 9 Instrumentation

After reading this chapter, you will be able to: Differentiate between the different types of magnetism. Understand the differences in MRI scanner design and form-factor. Explain the function of the technical components found inside an MRI scanner.

True/False

The clavicle connects the upper limb to the trunk of the body and provides attachments for several muscles and ligaments

True

True/False

The scapula is a long, slender bone that forms the posterior portion of the shoulder girdle.

False

True/False

The glenoid labrum deepens the articular surface of the glenoid fossa.

True

True/False

The shoulder joint is surrounded by a thick and rigid articular joint capsule.

False

True/False

The subacromial-subdeltoid bursa is the largest bursa in the body

True

True/False
The humerus articulates with the scapula superiorly and the radius and ulna inferiorly

True

True/False

The radius is located medially within the forearm.

False

True/False

The elbow joint primarily relies on the collateral ligaments for stability

True

True/False

The thenar group of hand muscles includes the abductor digiti minimi.

False

True/False
The axillary artery is the primary artery of the elbow.

False

Clavicle:

A long, slender bone connecting the upper limb to the trunk

Glenoid Labrum:

Deepens the articular surface of the glenoid fossa

Subacromial-Subdeltoid Bursa:

Largest bursa within the body

Triceps Brachii:

A muscle in the dorsal group of the upper arm

Ulna:

A medial bone in the forearm with olecranon and coronoid processes

Thenar Group:

Includes abductor pollicis brevis and opponens pollicis

Distal Humerus:

Contains the medial and lateral condyles with associated epicondyles

Radiocarpal Joint:

A joint connecting the distal radius and proximal carpals

Radial Artery:

A major artery of the elbow and forearm

Palmar Plate:

Fibrocartilaginous tissue covering the palmar surface of joints

True/False

The small conical projection on the medial bone of the forearm surface is called the ulnar styloid process.

True

Because of its superficial location, the ___________ nerve is the most frequently injured nerve of the body.

ulnar

True/False

The common interosseous artery begins at the level of the radial head and courses beneath the brachioradialis muscle.

False

The majority of rotator cuff lesions are a result of chronic impingement of the supraspinatus tendon against the acromial arch. The most susceptible area is approximately 1 cm from the insertion site of the supraspinatus tendon. This location is commonly referred to as the ____________ ____________.

critical zone

The major stabilizing element of the distal radioulnar joint is the:

Triangular fibrocartilage complex

What ligament in the elbow attaches to the annular ligament?

Radial collateral

Which rotator cuff tendon is the most frequently injured?

Supraspinatus

The Anconeous muscle's primary action is:

Assists triceps brachii in extension of elbow

Which of the following elbow joint ligaments consists of an anterior band, a posterior band, and a transverse band (ligament of Cooper)?

Ulnar collateral

Which nerve courses through the carpal tunnel?

Median

Which of the following carpal bones is located in the proximal row?

Scaphoid

Which of the following muscles is located in the posterior muscle group of the elbow?

Anconeus

The ulnar nerve is located:

Between the medial epicondyle of the humerus and the olecranon process

Which of the following arteries courses inferiorly on the medial side of the humerus, then continues anterior to the cubital fossa of the elbow and is the principal arterial supply to the arm? 

Brachial

Which rotator cuff muscle is located on the anterior surface of the scapula?

Subscapularis

True/False

The supraspinatus tendon inserts on lesser tubercle of the humerus.

False

Which muscle is the main flexor of the forearm?

Biceps brachii

Which ligament bids the radial head to the ulna?

Annular

The most medial and superficial muscle located in the anterior compartment of the forearm is the: 

Flexor carpi ulnaris

This is a small triangular-shaped muscle that spans between the first rib and clavicle, and acts to stabilize the clavicle and depress the shoulder:

subclavius

The infraspinatus tendon inserts on the:

greater tubercle

The teres major primary action is to ___________ and medially rotate the humerus

A) adduct 

Which muscle is NOT a muscle of the scapula?

Subclavius

Which ligaments protects the humeral head from direct trauma?

Coracoacromial

The cephalic vein opens into which vein?

Axillary

The proximal surface of the radiocarpal articulation is formed by the articular carpal surface of the ____________ and the TFCC

radius

What is # 3 ?

Radius

Which rotator cuff muscle inserts on the lesser tubercle of the humerus?

Subscapularis

It is a long, slender bone located anteriorly that extends transversely from the sternum to the acromion process of the scapula.

clavicle

DRUJ Stands for:

Distal radioulnar joint

What anatomy is # 2 ?

Scapula

What is letter a?

Median nerve

The distal radioulnar joint is created when the ulnar notch of the radius moves around the articular circumference of the _________

ulna

What anatomy is # 1 ?

Humeral head

What is letter c ?

Superior glenoid labrum

What is letter A?

Brachial artery

The oblique coronal views for an MRI of the shoulder need to be oriented ---

Parallel to the supraspinatus tendon

What is letter B pointing to ?

Humerus

The _________phalanges that make up the fingers.

14

What is letter A arrow pointing to ?

Ulnar artery

What is letter e ?

Olecranon process

What is letter C pointing to ?

Coracoid process

How many carpal bones are there ?

8

What is this special view of the shoulder joint called ?

Abduction external rotation

What is letter A pointing to ?

Supraspinatus muscle

What is letter e ?

Hook of the hamate

The primary function of the glenoid labrum is to:

Deepen the glenoid fossa

The primary arteries of the shoulder are the brachial artery and the:

axillary

What is letter a ?

Lateral epicondyle

What is letter a ?

Scaphoid

What ligamentous structure spans the wrist to create an enclosure for the passage of tendons?

Flexor retinaculum

What is letter c ?

Glenohumeral joint

The majority of rotator cuff lesions are a result of chronic impingement of the supraspinatus tendon against the acromial arch. The most susceptible area is approximately 1 cm from the insertion site of the supraspinatus tendon. This location is commonly referred to as the ________________ ____________.

critical zone

What is # 2 ?

Lunate

What is letter d ?

Triangular fibrocartilage complex

Because of its superficial location, the ____________ ________ is the most frequently injured nerve of the body.

ulnar nerve

What is arrow # 3 ?

Teres minor tendon

What is letter c ?

Coronoid process

The ulna is located _____________ within the arm.

medial

The main stabilizing element of the _________ is an articular disk called the triangular fibrocartilage complex

DRUJ

What is # 1 ?

humerus

What is # 2 ?

Acromion Process

What is letter d ?

Acromioclavicular ligament

What is letter a?

Biceps brachii tendon

What anatomy is # 2 ?

Ulna

What is letter d ?

Subscapularis tendon

The outer rim of the glenoid fossa is surrounded by a fibrocartilaginous ring termed the:

glenoid labrum

What is letter f ?

Acromion process

What is letter b ?

Supraspinatus muscle

Which rotator cuff tendon is the most frequently injured?

Supraspinatus

A fracture of the ____________ may result in a nonunion injury because of the traction of associated muscles. The ulnar nerve runs close to the hook of the hamate and may be injured as well, resulting in decreased grip strength of the hand.

hamate

What is the major stabilizing mechanism for the distal radioulnar joint?

Triangular fibrocartilage complex

What is letter c ?

Posterior glenoid labrum

Located on the anterior surface of the scapula is a beaklike process termed the ____________________.

Corocoid process

What is letter d ?

Scapular spine

What is # 2 ?

Scapula

The anterior surface of the scapula, the____________ _________, is flat and slightly concave.

subscapular fossa

What images will be created with this slice prescription ?

oblique coronal

What is # 3 ?

Supraspinatus muscle

What is # 4 ?

Ulna