Pectoral (shoulder) girdle

Question 1

What does the pectoral girdle do?

Answer 1

attaches the bones of the upper limbs to the axial skeleton

Question 2

What do the left & right pictorial girdles consist of?

Answer 2

a clavicle & a scapula

Question 3

What does the clavicle articulate with?

Answer 3

the clavicle is the anterior part of the girdle which articulates w the sternum

Question 4

What does the scapula articulate with?

Answer 4

the scapula is the posterior part of the girdle & articulates w the clavicle & humerus

Question 5

What do the pectoral girdles not articulate with?

Answer 5

the vertebral column

Question 6

what does the lateral end of the clavicle articulate with?

Answer 6

it articulates w the acrimon of the scapula

Question 7

what does the medial end of the clavicle articulate with?

Answer 7

the sternum

Question 8

Clavicle function

Answer 8

Bce of its position, the clavicle transmits mechanical force from the upper limb to the trunk.

Question 9

What is inferior to the acrimon?

Answer 9

the glenoid cavity

Question 10

What does the glenoid cavity articulate with?

Answer 10

the head of the humerus to form the shoulder joint

Question 11

What is the coracoid process?

Answer 11

a projection on the scapula where the muscles attach

Question 12

How many bones does the upper limb consist of?

Answer 12

30

Question 13

How does the pectoral girdle allow movements in many directions?

Answer 13

the joints of the shoulder girdles are freely movable

Question 14

What are the bones that make up the upper limb?

Answer 14

a humerus in the arm, ulna & radius in the forearm, 8 carpals (wrist bone), 5 metacarpals (palm bone), & 14 phalanges (finger bones) in the hand

Question 15

What is the longest bone of the upper limb?

Answer 15

the humerus

Question 16

What does the proximal end of the humerus contain?

Answer 16

The proximal end of the humerus consists of a head that articulates with the glenoid cavity of the scapula.

Question 17

What is right below the glenoid cavity?

Answer 17

the anatomical neck

Question 18

What is right below the anatomical neck?

Answer 18

the surgical neck

Question 19

What does the body of the humerus contain?

Answer 19

a roughened, V-shaped area called the deltoid tuberosity where the deltoid muscle attaches.

Question 20

What is at the distal end of the humerus?

Answer 20

the capitulum - it is a rounded knob that articulates with the head of the radius

Question 21

What part of the humerus articulates w the ulna?

Answer 21

trochlea

Question 22

Ulna

Answer 22

is on the medial aspect (little-finger side) of the forearm and is longer than the radius

Question 23

What is at the proximal end of the ulna?

Answer 23

the olecranon,

Question 24

In the forearm is the ulna on the medial side or the lateral side?

Answer 24

on the medial side, the radius is on the lateral side

Question 25

how many bones does the carpal consist of?

Answer 25

8

Question 26

Carpals arrangement

Answer 26

the carpals are held together by ligaments & arranged into 2 transverse row w 4 bones in each row

Question 27

In the atomically position, what are the carpals in the top row from the lateral to medial position?

Answer 27

scaphoid, lunate, triquetrum & pisiform

Question 28

what carpal bone is usually fractured & y

Answer 28

the scaphoid bone bc of the force transmitted through it from the radius

Question 29

In the atomical position, what carpal bones make up the bottom row from the lateral to the medial position?

Answer 29

trapezium, trapezoid, capitate & hamate

Question 30

Carpal tunnel

Answer 30

Together, the concavity formed by the pisiform & hamate & the scaphoid & trapezium constitute a space called the carpal tunnel. Through it pass the long flexor tendons of the digits & thumb & the median nerve

Question 31

What is the metacarpus?

Answer 31

the intermediate region of the hand & contains 5 bones called the metacarpals

Question 32

What does each metacarpal consist of?

Answer 32

Each metacarpal bone consists of a proximal base, an intermediate body, and a distal head. The metacarpal bones are numbered I through V (or 1 to 5), starting with the lateral bone in the thumb.

Question 33

What do the phalanges make up?

Answer 33

make up the distal region of the hand and are the bones of the digits.

Question 34

what is the term for a single phalanges

Answer 34

phalanx