bony features of humerus

Question 1

lesser tubercle

Answer 1

the lesser tubercle of the humerus is minor elevation on the front of upper end of humerus, just above the surgical neck.

Question 2

greater tubercle

Answer 2

the greater tubercle lies lateral to the head of the humerus as serves as the point of attachment for three of the rotator cuff muscles.

Question 3

intertubercular sulcus (bicipital groove)

Answer 3

deep groove on the humerus that separates the greater tubercle from the lesser tubercle

Question 4

anatomical neck of humerus

Answer 4

obliquely directed, forming an obtuse angle with the body of the humerus. It represents the fused epiphyseal plate

Question 5

surgical neck of humerus

Answer 5

constriction below the tubercles of the greater tubercle and lesser tubercle, and above the Deltoid Tuberosity.

Question 6

deltoid tuberosity

Answer 6

deltoid tuberosity is a rough, triangular area on the anterolateral (front-side) surface of the middle of the humerus to which the deltoid muscle attaches.

Question 7

lateral supra-epicondylar ridge

Answer 7

The lower part of the lateral border of the body of the humerus forms a prominent, rough margin, a little curved from behind forward, the lateral supracondylar ridge (or line), which presents an anterior lip for the origin of the Brachioradialis above, and Extensor carpi radialis longus below, a posterior lip for the Triceps brachii, and an intermediate ridge for the attachment of the lateral intermuscular septum.

Question 8

medial supra-epicondylar ridge

Answer 8

The inferior third of the medial border of the humerus is raised into a slight ridge, the medial supracondylar ridge (or medial supracondylar line), which becomes very prominent below; it presents an anterior lip for the origins of the Brachialis and Pronator teres, a posterior lip for the medial head of the Triceps brachii, and an intermediate ridge for the attachment of the medial intermuscular septum.

Question 9

lateral epicondyle

Answer 9

small, tuberculated eminence, curved a little forward, and giving attachment to the radial collateral ligament of the elbow joint, and to a tendon common to the origin of the supinator and some of the extensor muscles.

Question 10

medial epicondyle

Answer 10

an epicondyle of the humerus bone of the upper arm in humans.
It is larger and more prominent than the lateral epicondyle and is directed slightly more posteriorly in the anatomical position.
gives attachment to the ulnar collateral ligament of elbow joint, to the pronator teres, and to a common tendon of origin (the common flexor tendon) of some of the flexor muscles of the forearm:

Question 11

radial fossa (lateral)

Answer 11

small depression in the distal humerus on its anterior surface proximal to the capitulum. When the elbow is in complete flexion, the proximal end (the head) of the radius slides up along the capitulum and one edge of the head of the radius fits into the radial fossa.

Question 12

coronoid fossa (medial)

Answer 12

Superior to the anterior portion of the trochlea is a small depression, the coronoid fossa, which receives the coronoid process of the ulna during flexion of the forearm.

Question 13

olecranon fossa (posterior)

Answer 13

a deep triangular depression on the posterior side of the humerus, superior to the trochlea, in which the summit of the olecranon is received during extension of the forearm.