Module 3C: Upper Appendicular Skeleton Flashcards
how many bones are there in the appendicular skeleton?
126 bones
what is included in the appendicular skeleton?
UPPER:
- pectoral/shoulder girdle
- upper limbs
LOWER:
- pelvic girdle
- lower limbs
what is a girdle?
a belt-like structure encircling the body
what is the pectoral/clavicle girdle made up of?
the clavicle (collarbone) and the scapula (shoulder blade)
is there one or two shoulder girdles in our body?
there is a pair of shoulder girdles because there is a left and a right
what does the shoulder girdle do?
attaches the upper limbs to the body and also provides lots of points for attachment of muscles in the area
why is the shoulder girdle not attached posteriorly?
to allow for a lot of movement in the upper limbs
what is the clavicle attached to?
the manubrium and the scapula
when is the clavicle most anterior and when is it most posterior?
most anterior at the midline and most posterior at shoulder
the clavicle looks like an ‘S’ from which view?
inferior
backwards S for superior view
what are the two ends of the clavicle?
- sternal (medial) end; connects to sternum - somewhat quadrangular shaped
- acromial (lateral) end; connects to the acromion on the scapula - relatively flat shaped (she says this but on the picture she shows us, the other side looks more flat so idk)
where is the clavicle most prone to injury?
1/3 from the lateral side, where the bend is
- most weak because of the change in direction
what is the conoid tubercle (on clavicle)?
the attachment point for the coracoclavicular ligament that attaches to the clavicle to the coronoid process of the scapula
- on the inferior lateral end of the clavicle
what is the trapezoid line on a clavicle?
- on the inferior lateral end
- attachment point of the trapezoid ligament which is part of the coracoclavicular ligament
what is the costoclavicular ligament impression?
- on the inferior medial end of a clavicle
- an attachment point of the costoclavicular ligament
where does the scapula articulate with the humerus?
at the glenohumeral joint
where does the scapula articulate with the clavicle?
at the acromioclavicular joint
what joints connect the upper limbs to the trunk?
the glenohumeral and acromioclavicular joints
what are the 17 parts of the scapula we are going to cover?
- 2 joints
- 3 processes
- 2 angles
- 3 borders
- 3 fossa
- 1 notch
- 1 cavity
- 2 tubercles
what makes up most of the anterior surface of the scapula?
the subscapular fossa
- it will also touch the ribs on your back
what are the two joints of the scapula?
- the acromioclavicular joint
- the glenohumeral joint
what are the 3 processes of the scapula?
- acromion
- coracoid process
- spine (spinous process)
what are the 2 angles of the scapula?
- superior angle
- inferior angle
what are the 3 borders of the scapula?
- lateral (axillary) border
- medial (vertebral) border
- superior border