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Osteology 100 > Humerus > Flashcards

Humerus Flashcards

1
Q

Type of Bone

A

Long Bone

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2
Q

How to Distinguish L from R

A

Head Faces Medially toward Body

3 Fossae at Distal end - One Faces Posterior, 2 Face Anterior

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3
Q

Which 3 Joints are Associated with the Humerus

A

Glenohumeral
Humeroradial
Humeroulnar

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4
Q

Describe the Articulating Surfaces of the GH Jt

A

Glenoid Fossa of Scapula and Head of Humerus

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5
Q

Describe the Articulating Surfaces of the Humeroradial Jt

A

Capitulum of the Humerus and Head of Radius

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6
Q

Describe the Articulating Surfaces of the Humeroulnar Jt

A

Trochlea of the Humerus Received by the Trochlear Notch of the Ulna

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7
Q

Structural Classification of GH Jt

A

Synovial Ball and Socket

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8
Q

Structural Classification of Humeroradial Jt

A

Synovial Atypical Ball and Socket

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9
Q

Structural Classification of Humeroulnar Jt

A

Synovial Hinge

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10
Q

Associated Muscle Actions (6)

A

1) Humeral Flexors (Biceps Brachii, Brachialis, Coracobrachialis, and Deltoids)
2) Humeral Extensors (Triceps Brachii, Deltoids, and Latissimus Dorsi)
3) Humeral Medial Rotators (Teres Major and Subscapularis)
4) Humeral Lateral Rotators (Teres Minor and Infraspinatus)
5) Humeral ABductors (Deltoids and Supraspinatus)
6) Humeral ADductors (Teres Major, Pectoralis Major, and Coracobrachialis)

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11
Q

Palpable Landmarks (9)

A

1) Necks
2) Greater Tubercle
3) Lesser Tubercle
4) Bicipital Groove
5) Deltoid Tuberosity
6) Supracondylar Ridges
7) Epicondyles
8) Ulnar Groove
9) Olecranon Fossa

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12
Q

2 Necks of Humerus

A

Anatomical

Surgical

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13
Q

Location and Function of Anatomical Neck

A

L: Proximal Epiphyses, Above the Tubercles
F: Attachment for GH Joint Capsule
*Former site of epiphyseal growth plate in adults

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14
Q

Location and Function of Surgical Neck

A

L: Proximal Epiphyses, Below Tubercles
Where head tapers into shaft
F: N/A

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15
Q

Common Site of Humeral Fractures

A

Surgical Neck

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16
Q

Location and Function of Greater Tubercle

A

L: Large Blunt Rise on Proximal Lateral Shaft
F: MA - Supraspinatus, Infraspinatus, and Teres Minor
Creates Lateral Lip of Bicipital Groove

17
Q

Location and Function of Lesser Tubercle

A

L: Smaller Blunt Rise on Proximal Lateral Shaft
F: MA - Subscapularis
Creates Medial Lip of Bicipital Groove

18
Q

Location and Function of Bicipital Groove (Intertubercular Sulcus)

A

L: Between Greater and Lesser Tubercles
Biceps Brachii (Long Head) Tendon Lies along and
Forms this Groove
F: MA - Teres Major, Latissimus Dorsi, and Pectoralis Major

19
Q

Location and Function of Deltoid Tuberosity

A

L: Roughened Area on Lateral Shaft
F: MA - Deltoids

20
Q

Function of Medial Supracondylar Ridge/Crest

A

MA: Brachialis and Triceps Brachii

21
Q

Function of Medial Epicondyle

A

MA: CFT, Pronator Teres, Flexor Carpi Radialis, Palmaris Longus, Flexor Carpi Ulnaris, and Flexor Digitorum Superficialis
LA: Ulnar/Medial Collateral Lig.

22
Q

Function of Lateral Supracondylar Ridge/Crest

A

MA: Brachioradialis and Extensor Carpi Radialis Longus

23
Q

Function of Lateral Epicondyle

A

MA: Aconeus, Supinator, CET, Extensor Carpi Radialis Brevis, Extensor Digitorum, Extensor Digiti Minimi, and Extensor Carpi Ulnaris
LA: Radial/Lateral Collateral Lig.

24
Q

Location and Function of Ulnar Groove

A

L: Distal and Posterior to Medial Epicondyle
F: Pathway formed by Ulnar Nerve

25
Q

Function of Olecranon Fossa

A

F: Receives Olecranon Process of Ulna in Elbow Extension

26
Q

Non-Palpable Landmarks (6)

A

1) Head
2) Trochlea
3) Capitulum
4) Radial Fossa
5) Coronoid Fossa
6) Radial Groove

27
Q

Location and Function of Humerus Head

A

L: Rounded Joint surface at Proximal End
F: Joint Surface (GH Jt)

28
Q

Location and Function of Trochlea

A

L: On Medial Condyle
F: Joint Surface (Humeroulnar Jt) Received by Trochlea Notch of Ulna

29
Q

Location and Function of Capitulum

A

L: On Lateral Condyle
F: Joint Surface (Humeroradial Jt) Received by Head of Radius

30
Q

Location and Function of Radial Fossa

A

L: Distal Anterior Humerus
F: Receives Head of Radius in Humeroradial Jt Flexion

31
Q

Location and Function of Coronoid Fossa

A

L: Distal Anteromedial
F: Receives Coronoid Process of Ulna in Flexion

32
Q

Location and Function of Radial Groove

A

L: Shallow Oblique Depression on Posterior Shaft of Humerus; Runs Posterior to Lateral
F: Impression for Radial Nerve

Osteology 100 (10 decks)

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