Bones and bony landmarks of upper arm and shoulder joint: Humerus Flashcards
What bony landmark of the scapula does the humeral head articulate with, and what joint does this form?
Glenohumeral joint
Humeral head articulates with glenoid fossa of scapula
What landmark separates the humeral head from the greater and lesser tuberosities of the humerus, and where is it found?
8
Anatomical neck of humerus
Where is the greater tuberosity of the humerus, and describe its location relative to the humeral head and anatomical neck?
1
Greater tuberosity/tubercle is lateral to the humeral head and anatomical neck
Where is the lesser tuberosity of the humerus, and describe which 2 bony landmarks it is located between?
2
Lesser tuberosity/tubercle is located in between greater tuberosity and anatomical neck
How many facets does the greater tuberosity of humerus have, and which muscles attach to these?
Greater tuberosity of humerus has 3 facets
Supraspinatus attaches to superior facet
Infraspinatus attaches to middle facet
Teres minor attaches to inferior facet
Which muscle attaches to the lesser tuberosity of the humerus?
Subscapularis
What is the landmark located between the greater and lesser tuberosity of humerus, and what is the name of the edges of this landmark?
Intertubercular/bicipital groove/sulcus
Edges of the intertubercular groove are called lips
Which tendon runs through the intertubercular/bicipital groove/sulcus after originating from the shoulder joint?
Tendon of long head of biceps brachii
Where is the surgical neck of humerus, and describe its location relative to the anatomical neck of humerus?
11
Surgical neck is distal to anatomical neck
Describe the neurovascular structures surrounding the surgical head of humerus?
Axillary nerve lies against surgical neck, and it is surrounded by circumflex humeral arteries
What is the difference between the anatomical and surgical neck of humerus, in terms of fractures?
Surgical neck is more likely to be fractured than anatomical neck
Where is the deltoid tuberosity of humerus, and what muscle attaches here?
10
Deltoid attaches to deltoid tuberosity of humerus
Where is the radial/spiral groove of the humerus, and what direction does it run in?
9
Runs diagonally down humerus, from anterior to posterior humeral surface
Which nerve and artery lie in the radial/spiral groove?
Radial nerve
Profunda brachii artery
Where is the medial supraepicondylar ridge, and describe its location relative to the humeral head and shaft?
13
On ipsilateral side as humeral head
Immediately distal to humeral shaft, when it distinguishes into medial and lateral borders
Where is the lateral supraepicondylar ridge, and describe its location relative to the humeral head and shaft?
4
On contralateral side as humeral head
Immediately distal to humeral shaft, when it distinguishes into medial and lateral borders
Where is the medial epicondyle of the humerus?
16
Where is the lateral epicondyle of the humerus?
12
What extracapsular structure is located nearest to the medial epicondyle of humerus?
Trochlea
What extracapsular structure is located nearest to the lateral epicondyle of humerus?
Capitulum
Where is the coronoid fossa, and what bone does it articulate with?
14
Coronoid fossa of humerus articulates with coronoid process of ulna during elbow flexion
Where is the olecranon fossa, and what bone does it articulate with?
15
Olecranon fossa of humerus articulates with olecranon process of ulna during elbow flexion
Where is the radial fossa, and what bone does it articulate with?
5
Radial fossa of humerus articulates with head of radius during elbow flexion
