Download Pectoral Girdle and Upper Limb

Pectoral Girdle and Upper Limb
Correne Reyes, Summer Abiad,
Jordan Kolb
GET READY
FOR THE MOST
HUMERUS PRESENTATION YOU WILL
EVER SEE
Pectoral Girdle
• MAIN COMPONENTS:
1. Scapula (shoulder blades)
2. Clavicle (collar bones)
• Movements of the clavicle and scapula
position the shoulder joint and provide a base
for arm movement
• Important as sites for muscle attachment
Clavicle
• Connects the trunk to the upper limb by extending
from the manubrium of the sternum to the acromion
of the scapula
• Supports the humerus and scapula and maintains
their position relative to the rib cage
The smooth superior surface
of the clavicle lies just
beneath the skin.
The rough inferior surface of
the acromial end is marked
by prominent lines and
tubercles, attachment sites
for muscles and ligaments.
Scapula
Large, flat, triangular bone that connects the
clavicle to the humerus
GLENOID CAVITY:
Shallow and cupshaped on the head
of the scapula
which joins with
the head of the
humerus
SUBSCAPULAR FOSSA:
The depression in the
anterior surface of the
body of the scapula
Subscapularis muscle
attaches here and to
the humerus
Acromion:
larger posterior process
that extend over the
glenoid cavity
Scapular spine:
divides the posterior
surface of the scapula into
2 regions:
Supraspinous fossa
Infraspinous fossa
Upper Limb
• What we know generally as our arm, forearm,
wrist, and hand
• MAIN COMPONENTS:
1. The Humerus (one bone that extends from scapula to elbow)
2. Radius and Ulna
3. Wrist and Hand
The Humerus
Head
Greater
Tubercle:
forms the
lateral shape
of the
shoulder
Lesser
Tubercle:
Lies more
anteriorly,
separated from
greater tubercle
by an
intertubercular
groove
Anatomical
Neck:
Lies between
tubercles and
below surface of
head
Surgical Neck is
where the bone
grows. It is a
common
fracture site
Deltoid
Tuberosity:
attaches to
deltoid
muscle. Runs
along lateral
border of
shaft
At the distal end
of the humerus,
the shaft flattens
and forms a
triangle between
the
Medial
Epicondyle,
Lateral
epicondyle, and
condyle provide
additional surface
area for muscle
attachment.
Trochlea: large
medial portion
shaped like a
pulley.
Coronoid fossaanterior
olecranon fossaposterior
These accept
projections from
the ulna when you
move your elbow
Capitulum- forms
lateral region of
condyle
Radial Fossaprosimal to
capitulum and
accepts projection
from radius
Radius (lateral
aka thumb
side)
Ulna(pinky
side). Ulna
provides
medial
support of
forearm
Olecranon of
ulna is point
of elbow.
Trochlear
notch
Coronoid
Process
Radial Notchaccommodates
head of radius
Styloid process of
ulna
Styloid process of
radius- only the
radius involved
with wrist joint. It
prevents lateral
movement of
carpal bones
Radial
Tuberosity:
narrow neck
where biceps
barchii attach to
radius
Radial notchdisc shaped
head of radius
that articulates
with humerus
and ulna
Bones of Wrist
and Hand
4 Proximal
carpal bones:
Scaphoid Bone,
Lunate Bone,
Triquetrum
bone, pisiform
bone
4 distal carpal
bones:
trapezium,
trapazoid,
capitate, hamate
5 metacarpal
bones form
palm of hand
Each hand has
14 phalangeal
bones. Fingers
have the
proximal,
middle, and
distal phalanges.
LETS PLAY A GAME
Works Cited
• 2/22/Pectoral_girdle_front_diagram.svg/250pxPectoral_girdle_front_diagram.svg.png Textbook. N.p., n.d. Web. 18
Nov. 2012.
• Essentials of Anatomy and Physiology. N.p.: Pearson, 2007. Print.
• http://3.bp.blogspot.com/_ZT6BaKXUzP4/SptYSSRMtI/AAAAAAAAAFM/9QLtuJhssc0/s1600/pectoral+girdle.jpg
http://upload.wikimedia.org/wikipedia/commons/thumb/. N.p.,
n.d. Web. 18 Nov. 2012.
• http://test.classconnection.s3.amazonaws.com/812/flashcards/335
812/jpg/labeled_humerus.jpg. N.p., n.d. Web. 18 Nov. 2012.
• http://www.dartmouth.edu/~humananatomy/part_2/chapter_6.ht
mlWeb. 18 Nov. 2012.