Osteology Of the upper Limb Flashcards
The medial and lateral curves of the clavicle are shaped how
Convex and concave respectively
Notable parts of the ulna are
Olecranon process, Coronoid process, Trochlear notch, Ulnar tuberosity, styloid process
Regions of the upper limb
Shoulder, Arm, Forearm, Hand
Hand is also called
Manus
Arm is also called
Brachium
Forearm is also called
Antebrachium
The superior surface of the clavicle is ________ and the inferior surface is ________ with regard to their texture
Smooth, roughened
Fracture of the clavicle is common
At the middle and lateral third
Is the spine of the scapula located anteriorly or posteriorly?
Posteriorly
The spine of the scapula divides the scapula into
Supraspinous and infraspinous fossa
The muscles in the posterior surface of the scapula are
Supraspinatus and infraspinatus muscles
The groove between the greater and lesser tubercules is called
Intertubercular sulcus/ Bicipital groove
What is the main function on the shoulder girdle
To join the rest of the upper limb to the axial skeleton
The humerus articulates distally with
The radius and ulna bones of the forearm
The humerus articulates proximally with
The glenoid fossa of the scapula
The deltoid tuberosity is important because
It is an insertion point for the Deltoid muscle
The radial groove is important because
The radial nerve passes through it
The trochlea articulates with
The trochlear notch of the ulna
The capitulum articulates with
The radial head of the radius
The largest carpal bone is
Capitate
The largest carpal bone on the proximal row is
Scaphoid
The proximal carpal bones are
Scaphoid, lunate, triquetrum, pisiform
The distal carpal bones are
Trapezium, trapezoid , capitate hamate
A direct injury to the forearm bones usually produces transverse fractures at which part of the bones
The middle third
The fracture of forearm bone is likely to be associated with a dislocation of the nearest joint why
Because the shafts of these bones are firmly bound together by the interosseous membrane
What is a colles fracture
A complete fracture of the distal 2cm of the radius
The most common fracture of the forearm is the
Colles fracture
The colles fracture is often referred to as
Dinner fork deformity
Why is Colles fracture called the dinner fork deformity
Because a posterior angulation occurs in the forearm just proximal to the wrist and the normal anterior curvature of the relaxed hand
What is the most frequently fractured carpal bone
Scaphoid
In the fracture of the scaphoid, on palpation, pain is produced where
In the anatomical snuff box, on the lateral side of the wrist, especially during Dorsiflexion and abduction of the hand
Why is a fracture of the scaphoid more visible 10-14 days after on the radiograph
Because bone resorption would have taken place
What is the reason for slow healing process of a fracture of the scaphoid
Poor blood supply to the proximal part of the scaphoid
Fracture of the scaphoid is often misdiagnosed as
Severely strained wrist
Fracture of the hamate may result in non union of the fractured bony parts why
Because of the traction produced by attached hypothenar muscles
Fracture of the hamate may also affect
The ulnar nerve- resulting in reduced grip strength of the hand
The ulnar artery
Fracture of the hamate may also affect
The ulnar nerve- resulting in reduced grip strength of the hand
The ulnar artery
Isolated fracture of the metacarpals are usually stable why
Because the metacarpals except the 1st are closely bound together
Fracture of the 5th metacarpal is also called
Boxer’s fracture
