Podcast
Questions and Answers
What best describes the anatomical neck of the humerus?
What best describes the anatomical neck of the humerus?
- Wide region above the surgical neck (correct)
- Narrow constriction prone to fracture
- Articulation point with the scapula
- Area of muscular attachment
Which structure is responsible for the attachment of the biceps brachii muscle?
Which structure is responsible for the attachment of the biceps brachii muscle?
- Medial lip of the intertubercular groove (correct)
- Greater tuberosity
- Coracoacromial ligament
- Lateral lip of the intertubercular groove
Which ligament is part of the glenohumeral joint complex?
Which ligament is part of the glenohumeral joint complex?
- Radial collateral ligament
- Ulna collateral ligament
- Coracoacromial ligament
- Glenohumeral ligament (correct)
In which part of the humerus does the deltoid tuberosity form?
In which part of the humerus does the deltoid tuberosity form?
Which region of the humerus is most likely to sustain fractures due to its narrow constriction?
Which region of the humerus is most likely to sustain fractures due to its narrow constriction?
What area of the humerus has the greatest muscular attachment?
What area of the humerus has the greatest muscular attachment?
Which ligament provides stability to the medial side of the elbow joint?
Which ligament provides stability to the medial side of the elbow joint?
Which term refers to the large circular part of the humerus that articulates with the glenoid cavity of the scapula?
Which term refers to the large circular part of the humerus that articulates with the glenoid cavity of the scapula?
Flashcards
Anatomical Neck (Humerus)
Anatomical Neck (Humerus)
The wide upper portion of the humerus, proximal to the tubercles.
Surgical Neck (Humerus)
Surgical Neck (Humerus)
The narrow constriction below the anatomical neck, prone to fractures.
Greater Tubercle (Humerus)
Greater Tubercle (Humerus)
A large, rounded projection on the lateral side of the humerus.
Lesser Tubercle (Humerus)
Lesser Tubercle (Humerus)
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Deltoid Tuberosity (Humerus)
Deltoid Tuberosity (Humerus)
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Glenohumeral Ligaments
Glenohumeral Ligaments
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Coracoumeral Ligament
Coracoumeral Ligament
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Glenohumeral Joint
Glenohumeral Joint
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Bicipital Groove (Intertubercular Groove)
Bicipital Groove (Intertubercular Groove)
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Study Notes
Humerus
- Anatomical position: A key aspect of study, vital for identifying the bone.
- General features: Understanding the overall characteristics of the humerus, including parts like the head, neck, and shaft.
- Identification of the side: Methods to distinguish between a left and right humerus.
- Muscular attachments: Points where muscles connect to the humerus.
- Articulations: Joints formed by the humerus with other bones.
- Ligaments: Structures connecting bones and supporting the humerus at joint surfaces.
Anatomical Position
- The standard anatomical position is crucial for referencing body parts and anatomical features.
Identification of the Side
- Determining the left or right side of the humerus involves observing specific features.
General Features (Humerus)
- Upper end: Comprising the head, anatomical neck, surgical neck, greater tuberosity, lesser tuberosity, and bicipital groove.
- Shaft: The central part, divided into upper (cylindrical) and lower (triangular) halves, with specific borders (anterior, medial, lateral) and surfaces (anteromedial, anterolateral, posterior).
- Lower end: Includes the trochlea, capitulum, fossae (coronoid, radial, olecranon), and epicondyles (medial and lateral).
Muscular Attachments (Humerus)
- Key locations where muscles attach to the humerus, categorized by the muscle type or function.
- Muscles listed include supraspinatus, infraspinatus, subscapularis, teres minor, teres major, latissimus dorsi, pectoralis major, coracobrachialis, brachioradialis, extensor carpi radialis longus, triceps brachii (heads), deltoid, brachialis, anconeus, common flexor origin, and pronator teres.
Articulations (Humerus)
- Shoulder joint: Describes the articulation between the humerus, scapula, and supporting structures.
- Elbow joint: Focuses on the connection between the humerus, ulna, and radius. Articulation types/ directions (upward, downward) are highlighted.
Ligaments (Humerus)
- Transverse humeral ligament: A crucial component for shoulder stability.
- Coracohumeral ligament: Provides strength to the shoulder joint
- Glenohumeral ligaments: Strengthen the glenohumeral joint.
- Ulnar collateral ligament: A key ligament at the elbow joint, contributing to its stability.
- Radial collateral ligament: Another crucial ligament at the elbow joint, providing support.
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