Downloaded 447 times
Uploaded byVibhuti Nautiyal
Anatomy of scapula
The scapula, a large, flat, triangular bone located on the thoracic cage's posterolateral aspect, comprises two surfaces (costal and dorsal), three borders (superior, axillary, and vertebral), three angles (superior, inferior, and lateral), and three processes (spine, acromion, and coracoid). Its anatomy facilitates muscle attachments and arm movement, with specific origins and insertions described for various muscles. Additionally, the document outlines the ligaments associated with the scapula and criteria for side determination.
In this document
Powered by AI
Introduction to the scapula's anatomy by presenter Vibhuti Nautiyal, highlighting its significance in musculoskeletal studies.
Description of scapula as a large, flat, triangular bone with two surfaces, three borders, three angles, and three processes.
Detailed examination of the costal surface's features and its role in arm abduction, influenced by muscles.
Structure of dorsal surface, its division into supraspinous and infraspinous fossa, and their muscular origins.
Identifying three borders of the scapula, their characteristics, and landmarks like the suprascapular notch.
Explanation of the three angles formed at the junctions of the scapula's borders, detailing their characteristics.
Overview of the three processes: spine, acromion, and coracoid, with explanations of their functions and features.
Muscle origins and insertions on the scapula, detailing ligaments and the structural significance for muscle attachment.
Criteria for determining the side of the scapula based on angles, surfaces, and notable features.
Closing remarks and gratitude from the presenter concerning the presentation on scapular anatomy.
More Related Content
Similar to Anatomy of scapula
Anatomy of scapula
- 1. ANATOMY OF SCAPULA Vibhuti Nautiyal MPT(Musculoskeletal)
- 2. ANATOMY Large, flatand triangular bone Placed on the posterolateral aspect of the thoracic cage Has two surfaces, three borders, three angles and three processes
- 4. TWO SURFACES 1. Costalsurface: Also known as ventral surface or subscapular fossa Presents a broad concavity (directed medially and forwards) Medial two- thirds of the fossa are marked by several oblique ridges; run lateralward and upwards Lateral third of the fossa is smooth Thick ridge adjoins the lateral border Almost rod- like Acts as a lever for the action of S.A in overhead abduction of the arm
- 5. 2. Dorsal surface: Arched from above downwards Gives attachment to the spine of scapula which divides the surface into two unequal parts: suraspinatous fossa and infraspinatous fossa Two fossa are connected by the supraglenoid notch, situated lateral to the root of the spine a. Supraspinatus fossa: Smaller of the two Concave, smooth and broader Medial two thirds give origin to the supraspinatus
- 6. b. Infraspinatous fossa: Much larger Shallow concavity at its upper part Centre presents a prominent convexity Medial two- thirds gives origin to the Infraspinatus muscle
- 8. THREE BORDERS 1. Superiorborder: Shortest and thinnest, most irregular Concave Extends from the medial angle to the base of the coracoid process Near the root of the coracoid process it presents the suprascapular notch 2. Axillary border or lateral border: Thickest Begins above at the lower margin of the glenoid cavity
- 9. Inclines obliquelydownward and backward to the inferior angle At the upper end it presents the infraglenoid tubercle 3. Vertebral border or medial border: Longest Extends from the superior angle to the inferior angle
- 11. THREE ANGLES 1. Superiorangle: Formed by the junction of the superior and vertebral borders Thin, smooth, rounded Inclined somewhat lateralward Covered by the trapezius 2. Inferior angle: Thick and rough Formed by the union of the vertebral and axillary border Covered by the Latissimus dorsi
- 12. Moves forwardsround the chest when the arm is abducted 3. Lateral angle: Also known as glenoid angle Thickest part of the bone Bears the glenoid cavity or fossa Directed forwards, laterally and slightly upwrads
- 13. THREE PROCESSES 1. Spineor Spinous process: Triangular part of bone Three borders and two surfaces Divides the dorsal surface of the scapula into the supraspinous and infraspinous fossae Posterior border is called the crest of the spine Crest has upper and lower lips Lateral border is the shortest, is slightly concave, thick and round
- 14. 2. Acromion process: Large and somewhat triangular Has two borders, medial and lateral Lateral border is thick and irregular Medial border is shorter than the lateral and concave Two surfaces, superior and inferior Superior surface is directed upwards, backward and lateralwards; convex, rough Inferior surface is smooth and concave A facet for the calvicle
- 15. 3. Coracoid process: Thick curved process Attached by a broad base to the upper part of the neck of the scapula Directed forwards and slightly laterally
- 17. ATTACHMENTS 1. Muscles: origin Subscapularis: medial two- thirds of the subscapular fossa Supraspinatus: medial two- thirds of the supraspinatous fossa including the upper surface of the spine Infraspinatus: medial two- thirds of the infraspinatous fossa including the lower surface of the spine Deltoid: lower border of the crest of the spine and from the lateral border of the acromion Biceps brachii: long head; supraglenoid tubercle, short head; lateral part of the tip of the coracoid process
- 18. Coracobrachialis: medialpart of the tip of the coracoid process Triceps brachii: long head from the infraglenoid tubercle Teres minor: dorsal surface, upper two- thirds, lateral border Teres major: dorsal surface, lower one- third, lateral border Omohyoid: suprascapular notch Insertion: Trapezius: upper border of the crest of the spine and medial border of the acromoin S.A: medial border of the costal surface Pectoralis minor: medial border and the superior surface of the coracoid process Leavtor scapulae: dorsal aspect, medial border, from the superior angle to the root of the spine
- 19. Rhomboideus minor:medial border, dorsal aspect, opposite the root of the spine Rhomboideus major: medial border, dorsal aspect, between the root of the spine and the inferior angle Ligaments: Glenoid labrum: margin of the glenoid cavity Capsule of the AC joint: margin of the acromion facet Coracoacromial ligament: lateral border of the coracoid process, medial side of the tip f the acromion process Coracohumeral ligament: root of the coracoid process Coracoclavicular ligament: coracoid process Suprascapular ligament: bridges across the suprascapular notch
- 22. SIDE DETERMINATION Lateralor glenoid angle is large and bears the glenoid cavity The dorsal surface is convex and is divided by the triangular spine into the supraspious and infrsapinous fossa Costal surface is concave Lateral thickest border runs from the glenoid cavity above to the inferior angle below
- 24.