P1 ANATOMY Flashcards
Movements of shoulder joint
Most of the motor and
sensory nerves of the
upper limb are derived
from the
brachial plexus
name the joint and its type
name the joint and its type
name the ligament
coracoclavicular ligament
name the ligament
Coracoacromial
ligament
name the ligament
Costoclavicular
ligament
showing the interior surface of the clavicle
Q: Identify the ligament seen in this impression
costoclavicular ligament
showing lateral view of the scapula
Q: name the tubercle & what muscle originates from it
- Infraglenoid tubercle
- origin of long head of triceps
showing lateral view of the scapula
Q: name the tubercle & what muscle originates from it
-Supraglenoid tubercle
- origin of long head of biceps
what is the shoulder girdle
scapula + clavicle
what is the importance of the shoulder girdle
connects the upper limb to the axial skeleton
type of GLENOHUMERAL joint
ball & socket joint , synovial joint
fibrocartilage rim seen in glenoid cavity known as
glenoid labrum
Importance of glenoid labrum
Stability of the joint as it widens & deepens glenoid cavity
Fibrous capsule will be Medially attached to the
margin of glenoid cavity outside glenoid labrum.
Fibrous capsule will be laterally attached to the
Anatomical neck of the humerus
also medial part of surgical neck
Synovial membrane lines the capsule and all
intraarticular structures of joint except
articular cartilage.
name the ligament pointed by the arrow
Coracohumeral ligament
name the ligament pointed by the arrow
Superior transverse scapular ligament
name the ligament pointed by the arrow
Transverse humeral ligament
the transverse humeral ligament bridges over which muscle
long head of biceps
name the ligament pointed by the arrow
Coracoacromial ligament
Importance of Coracoacromial
ligament
Prevents superior displacement of
humeral head.
name the part of the Coracoclavicular ligament pointed by the arrow
Trapezoid part
name the part of the Coracoclavicular ligament pointed by the arrow
Conoid part
Opened shoulder joint , identify the intracapsular structure pointed by the arrow
long head of biceps brachii
mention the bursae’s found in the GLENOHUMERAL joint
- subacromial / subdeltoid
- sub-scapular
bursae functions as
Cushion between tendons & joint structures
showing the Ant. view of glenohumeral joint
Identify which bursae is pointed at by the arrow
subacromial / subdeltoid
showing the Ant. view of glenohumeral joint
Identify which bursae is pointed at by the arrow
- sub-scapular
mention the 4 muscles that forms the rotator cuff
1- supra-spinatus
2-infra-spinatus
3- teres minor
4- subscapularis
showing Post. View of the joint
Identify the space marked by the blue box
Quadrangular space
what is the inferior border of of the Quadrangular space
teres major muscle
what is the lateral border of of the Quadrangular space
Surgical neck of humerus
what is the medial border of of the Quadrangular space
long head of triceps
what is the superior border of of the Quadrangular space
teres minor
what are the contents of the
axillary / circumflex nerve
post. Circumflex humeral Art.
most common site of shoulder joint dislocation
Inferiorly
what nerve is injured incase of inferior dislocation of shoulder
axillary nerve
what Deformity is seen incase of axillary nerve injury
flat shoulder deformity
Mention the 4 muscles that causes flexion
-Pectoralis major
-biceps brachii
-deltoid
- coracobrachialis
which fibers of the deltoid are responsible for flexion
Anterior fibers
Mention the 4 muscles that causes extension
- Latissimus dorsi
-teres major - triceps
- Deltoid
which fibers of the deltoid are responsible for extension
Posterior fibers
muscle thats responsible for 0-15 degree abduction
supraspinatus
muscle thats responsible for 15-90 degree abduction
middle fibers of deltoid
muscles responsible for abduction beyond 90 degree
serratus anterior & trapezius.
mention the 5 muscles that are responsible for adduction
- Pectoralis major
- latissimus dorsi
- teres major
- teres minor
- subscapularis.
mention the 3 muscles that are responsible for external or lateral rotation
-Infraspinatus
- teres minor
- posterior fibres of deltoid
mention the 5 muscles that are responsible for internal or medial rotation
- Subscapularis
- pectoralis major
- teres major
- latissimus dorsi
- deltoid anterior fibers
Arterial supply to shoulder joint
Ant. & Post. Circumflex humeral arteries
suprascapular artery
innervation to the shoulder joint
Suprascapular, axillary and lateral pectoral nerves.
what Ligamentous factor is responsible for 2nd socket that prevents upwards dislocation
Coraco-acromial arch
2 origins of PECTORALIS MAJOR MUSCLE
1- clavicle
2- sternocostal
insertion of PECTORALIS MAJOR MUSCLE
into the lateral lip of bicipital groove
nerve supply to PECTORALIS MAJOR MUSCLE
medial & lateral pectoral nerves
origin of pectoralis minor
3rd , 4th & 5th ribs
insertion of pectoralis minor
coracoid process of the
scapula.
innervation of perctoralis minor
medial pectoral nerves.
origin of subclavius muscle
1st costochondral junction
insertion of subclavius muscle
subclavius groove
innervation of subcalvius muscle
subclavius nerve
origin of SERRATUS ANTERIOR MUSCLE
eight digits from the outer
surface of the upper 8 ribs.
insertion of serratus Ant. muscle
anterior surface of the medial
border and inferior angle of scapula
innervation of serratus Ant. muscle
long thoracic nerve
innervation of trapezius muscle
spinal accessory nerve (motor) and C3,4 nerves
origin of trapezius muscle
external occipital protuberance and
superior nuchal line& ligamentum nuchae, spine of C7 vertebra & all thoracic spines
& supraspinous ligaments.
insertion of trapezius muscle
posterior border of lateral 1/3 of clavicle,
medial border of acromion &
upper border of spine of crest
of scapula
origin of LATISSIMUS DORSI
spines of the dorsi muscle
lower six thoracic spines, thoracolumber fascia, outer lip of the
posterior part of iliac crest, lower
four ribs and dorsal aspect of inferior
angle of scapula.
insertion of LATISSIMUS DORSI
floor of bicipital groove
innervation of LATISSIMUS DORSI
thoraco-dorsal nerve
Identify the muscle & its origin
Levator scapulae muscle
originates from transverse processes of
upper 4 cervical vertebrae.
insertion of levator scapulae muscle
Dorsal aspect of medial border of the scapula
from the superior angle to root of spine
innervation of levator scapulae muscle
Dorsal scapular
nerve (C5)
Identify the muscle & its origin
Rhomboideus Minor Muscle
originates fromLower part of ligamentum
nuchae and spines of C7 & T1.
insertion of Rhomboideus Minor
dorsal aspect of medial border of scapula opposite root of spine
Identify the muscle & its origin
Rhomboideus Major Muscle
originates from spines of T2-T5 vertebrae
insertion of Rhomboideus major
dorsal aspect of the medial border of scapula from the spine to the inferior angle.
innervation of both Rhomboideus
Dorsal scapular nerve
identify the muscle & its insertion
teres major inserted into the medial lip of the
bicipital groove
Innervation of teres major
Lower Subscapular nerve
identify the muscle & its insertion
teres minor
inserted into lower facet of greater tuberosity of
humerus
innervation of teres minor
axillary nerve
identify the muscle & its innervation
Subscapularis Muscle
innervated by Upper & Lower Subscapular nerves
identify the muscle & its innervation
Supraspinatus Muscle
innervated by Suprascapular nerve
identify the muscle & its insertion
Infraspinatus Muscle
inserted in middle facet of greater
tuberosity of humerus.
