Kinesiology of PE
Chapter 4: The Shoulder Girdle
Chapter 4: The Shoulder Girdle
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This flashcard set delves into the intricate kinesiology of the shoulder girdle, focusing on muscles like the pectoralis minor, serratus anterior, and trapezius, along with their actions, origins, insertions, and innervations. It covers key movements such as rotation, elevation, and depression, and explores joints like the acromioclavicular and sternoclavicular. Ideal for university students studying medical anatomy, this set provides a detailed understanding of shoulder mechanics, benefiting those aiming to master the complex interplay of muscles and bones in the shoulder region.
Cartes-fiches
19
Utilisateurs
1
Langue
Anglais
Catégorie
Médecine
Niveau
Université
Créé / Mis à jour
30.09.2015 / 30.09.2015
Anterior Shoulder Girdle: Key Bony Landmarks
Commandes clavier:
= tourner,
= avant/arrière,
= faire défiler
- Manubrium
- Clavicle
- Coracoid Process
- Acromion Process
- Glenoid fossa
- Scapula
Posterior Key Bony Landmarks of Shoulder Girdle
Commandes clavier:
= tourner,
= avant/arrière,
= faire défiler
- Lateral border
- inferior angle
- medial border
- superior angle
- spine of the scapula
Shoulder Girdle (scapulothoracic) joint
Commandes clavier:
= tourner,
= avant/arrière,
= faire défiler
scapula moves on the rib cage
joint motion occurs at sternoclavicular joint & acromioclavicular joint
Scapulothoracic Joint
Commandes clavier:
= tourner,
= avant/arrière,
= faire défiler
- not a true synovial joint
- does not have regular synovial features
- supported dynamically by its muscles
- no ligamentous support
Sternoclavicular (SC)
Commandes clavier:
= tourner,
= avant/arrière,
= faire défiler
- arthrodial classification
- ligaments
- anterior & posterior SC ligament
- Costoclavicular ligament prevents superior displacement
- the clavicle moves anteriorly 15 degrees with protraction and moves posteriorly 15 degress with retraction
Acromio-clavicular (AC)
Commandes clavier:
= tourner,
= avant/arrière,
= faire défiler
- arthrodial classification
- supported by CC & AC ligaments
- often injured
Abduction (protraction)
Commandes clavier:
= tourner,
= avant/arrière,
= faire défiler
scapula moves laterally away from spinal column
Transverse plane
Adduction (retraction)
Commandes clavier:
= tourner,
= avant/arrière,
= faire défiler
scapula moves medially toward spinal column
tranverse plane
Upward Rotation
Commandes clavier:
= tourner,
= avant/arrière,
= faire défiler
- moving glenoid fossa & inferior angle of scapula upwards & outwards
- frontal plane
Downward rotation
Commandes clavier:
= tourner,
= avant/arrière,
= faire défiler
returning inferior angle toward spinal column
frontal plane
Elevation
- superior movement
- shrugging shoulder
- frontal plane
Depression
- downward or inferior movement
- fontral plane
Trapezius Muscle- Upper Fibers
- Action:
- Elevation- frontal axis
- Upward rotation frotal axis
- extension of head at neck sagittal
- rotation of head at neck transverse
- Origin: base of skull, occipital bone, posterior liagments of neck
- Insertion: posterior aspect of lateral 3rd clavicle
- Innervation: spinal accessory nerve and branches of C3 and C4
Trapezius Muscle: Middle Fibers
- Action:
- elevation- frontal
- adduction- transverse
- upward rotation- frontal
- Origin: spinous process of C7 & T1-3
- Insertion: medial border of acromion process & upper border of scapular spine
- Innervation: spinal accessory nerve and branches of C3 and C4
Trapezius Muscle: Lower Fibers
- Action:
- Depression- frontal
- retraction- transverse
- uowards rotation- frontal
- Origin: spinous process of T4-12
- Insertion: triangular space at base of scapular spine
- Innervation: spinal accessory nerve and branches of C3 and C4
Levator Scapulae
- Action:
- elevation: frontal
- weak doward rotation
- weak retraction
- Origin: transverse process of C1-4
- Insertion Medial border & superior angle of scapula
- Innervation: Dorsal scapula nerve, branches of C3-5
Rhomboid Major/Minor
- Action:
- Retraction: transverse
- Downward rotation: frontal
- elevation: frontal
- Origin: spinous process of C7&T1-5
- Insertion: medial borderof scapula below spine of scapula
- Innervation: dorsal scapular nerve (C5)
Serratus Anterior
- Action:
- protraction: transverse
- upward rotation: frontal
- Origin: surface lateral ribs 1-9
- Insertion: anterior aspect of medial border of scapula
- Innervation: long thoracic nerve (C5-7)
Pectoralis Minor
- Action:
- protraction- transverse
- downward rotation: frontal
- depression: frontal
- Origin: anterior surface of ribs 3-5
- Insertion: Anterior aspect of whole length of medial border of the scapula
- Innervation: Medial pectoral nerve (c8-T1)
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Cartes-fiches
Anterior Shoulder Girdle: Key Bony Landmarks
- Manubrium
- Clavicle
- Coracoid Process
- Acromion Process
- Glenoid fossa
- Scapula
Posterior Key Bony Landmarks of Shoulder Girdle
- Lateral border
- inferior angle
- medial border
- superior angle
- spine of the scapula
Shoulder Girdle (scapulothoracic) joint
scapula moves on the rib cage
joint motion occurs at sternoclavicular joint & acromioclavicular joint
Scapulothoracic Joint
- not a true synovial joint
- does not have regular synovial features
- supported dynamically by its muscles
- no ligamentous support
Sternoclavicular (SC)
- arthrodial classification
- ligaments
- anterior & posterior SC ligament
- Costoclavicular ligament prevents superior displacement
- the clavicle moves anteriorly 15 degrees with protraction and moves posteriorly 15 degress with retraction
Acromio-clavicular (AC)
- arthrodial classification
- supported by CC & AC ligaments
- often injured
Abduction (protraction)
scapula moves laterally away from spinal column
Transverse plane
Adduction (retraction)
scapula moves medially toward spinal column
tranverse plane
Upward Rotation
- moving glenoid fossa & inferior angle of scapula upwards & outwards
- frontal plane
Downward rotation
returning inferior angle toward spinal column
frontal plane
Elevation
- superior movement
- shrugging shoulder
- frontal plane
Depression
- downward or inferior movement
- fontral plane
Trapezius Muscle- Upper Fibers
- Action:
- Elevation- frontal axis
- Upward rotation frotal axis
- extension of head at neck sagittal
- rotation of head at neck transverse
- Origin: base of skull, occipital bone, posterior liagments of neck
- Insertion: posterior aspect of lateral 3rd clavicle
- Innervation: spinal accessory nerve and branches of C3 and C4
Trapezius Muscle: Middle Fibers
- Action:
- elevation- frontal
- adduction- transverse
- upward rotation- frontal
- Origin: spinous process of C7 & T1-3
- Insertion: medial border of acromion process & upper border of scapular spine
- Innervation: spinal accessory nerve and branches of C3 and C4
Trapezius Muscle: Lower Fibers
- Action:
- Depression- frontal
- retraction- transverse
- uowards rotation- frontal
- Origin: spinous process of T4-12
- Insertion: triangular space at base of scapular spine
- Innervation: spinal accessory nerve and branches of C3 and C4
Levator Scapulae
- Action:
- elevation: frontal
- weak doward rotation
- weak retraction
- Origin: transverse process of C1-4
- Insertion Medial border & superior angle of scapula
- Innervation: Dorsal scapula nerve, branches of C3-5
Rhomboid Major/Minor
- Action:
- Retraction: transverse
- Downward rotation: frontal
- elevation: frontal
- Origin: spinous process of C7&T1-5
- Insertion: medial borderof scapula below spine of scapula
- Innervation: dorsal scapular nerve (C5)
Serratus Anterior
- Action:
- protraction: transverse
- upward rotation: frontal
- Origin: surface lateral ribs 1-9
- Insertion: anterior aspect of medial border of scapula
- Innervation: long thoracic nerve (C5-7)
Pectoralis Minor
- Action:
- protraction- transverse
- downward rotation: frontal
- depression: frontal
- Origin: anterior surface of ribs 3-5
- Insertion: Anterior aspect of whole length of medial border of the scapula
- Innervation: Medial pectoral nerve (c8-T1)
