3_Superficial Back

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University of Guelph *

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3401

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Anatomy

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Oct 30, 2023

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Lesson 3 Osteology Pectoral Girdle and Proximal Humerus Posterior Axioappendicular (Thoraco-appendicular) Muscles Superficial (Extrinsic Shoulder) Trapezius Latissimus Dorsi Deep (Extrinsic Shoulder) Levator Scapulae Rhomboid Minor / Major Scapulohumeral (Intrinsic Shoulder) Muscles: Supraspinatus Infraspinatus Teres Minor Subscapularis Deltoid Teres Major Reference Pages in Moore’s Essential Clinical Anatomy, 7 th Edition Chapter 3 Osteology - Pages 92 – 96; Posterior Axioappendicular and Scapulohumeral Muscles – Pages 113 – 117. University of Guelph F23 HK*3401 Human Anatomy joining vertebral gas tonneau spinal fume m upper units I wave a me extrinsic muscles joining scapula to numerus confinedmuscles
SUPERFICIAL Trapezius Latissimus Dorsi Shoulder Muscles Posterior Thoracoappendicular Muscles Posterior Axioappendicular Muscles Extrinsic Shoulder Muscles Superficial Extrinsic Shoulder - Trapezius Latissimus Dorsi Deep Extrinsic Shoulder - Levator Scapulae Rhomboid Minor Rhomboid Major Image(s) from Gilroy, Atlas of Anatomy (3 rd Edition) FYI Terminology p region of back
SUPERFICIAL Trapezius Latissimus Dorsi Shoulder Muscles Scapulohumeral Muscles Intrinsic Shoulder Muscles Muscles of Rotator Cuff - Suprapinatus Infraspinatus Teres Minor Subscapularis Others - Teres Major Deltoid Image(s) from Gilroy, Atlas of Anatomy (3 rd Edition) FYI Terminology intrinsia closey associated in shoulder joint
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Clavicle Scapula • Incomplete Bony Ring • Attachment and Support of Upper Limb Bones of Pectoral Girdle Pectoral Girdle Anterior View Is shaped two bones associated w pectoralgirdle C shape pair of bones movement of upper limb
Scapula Clavicle Humerus Manubrium Sternum Superior View Pectoral Girdle Bones of Pectoral Girdle plane for humerus to attain to sits on post aspect of thorax articulates a aspect of scapula
Spine of Scapula Acromion Clavicle Horseshoe Matters For: • Trapezius • Deltoid Superior View Pectoral Girdle gone y hove shoe lateral aspect clavicle acromion spine of scapula flattens out at acromion of scapula articulates a most lateral aspect of clavicle
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Clavicle and Scapula Anterior View Posterior View Coracoid Process of Scapula Subscapular Fossa Suprascapular Notch Pectoral Girdle p bite out of superior portion of scapula pbirds beat coracoid acromion i medial aspect cansee coracoid can see acromion
Spine of Scapula Acromion Posterior View Infraspinous Fossa Supraspinous Fossa Pectoral Girdle Clavicle and Scapula clavicle joins here
Glenoid Cavity of Scapula Lateral View Articulates with Head of Humerus Lateral View Pectoral Girdle Clavicle and Scapula anterior
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Suprascapular Notch Suprascapular Ligament Posterior View Anterior View Posterior View Suprascapular Nerve (and Artery) Route to Infraspinous Fossa acromion
Proximal Humerus Greater Tubercle Lesser Tubercle Deltoid Tuberosity Intertubercular Groove Osteology of Shoulder Region Anterior View numerus coracoid pairof bumps smaller mid humerus
Lesser Tubercle Greater Tubercle Intertubercular Groove Anterior View Superior View Osteology of Shoulder Region Proximal Humerus Anterior ghead greater lesser
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Posterior Axioappendicular (Thoracoappendicular) Muscles Superficial (Extrinsic Shoulder) Trapezius Latissimus Dorsi Deep (Extrinsic Shoulder) Levator Scapulae Rhomboid Minor Rhomboid Major originate on vertebral column found if reflect tra insert iitialmedial aspect of sapula originate on ve posterior view
Base of Skull Nuchal Ligament Spinous Processes (C7 – T12) Lateral 1/3 of Clavicle Acromion Spine of Scapula Trapezius originates on ve origin allthe way down to tie inserts here
Suprapinous Ligament Nuchal Ligament Trapezius Base of Skull Nuchal Ligament Spinous Processes (C7 – T12) Lateral 1/3 of Clavicle Acromion Spine of Scapula muti directional fibre's multi action clarify this is it all the origin Fusion of
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Elevate Retract Scapula Depress Rotate Scapula: glenoid cavity up Action Innervation Spinal Accessory Nerve Trapezius ying slap toward midline horseshoe when fibers work together
Origin Spinous Processes: Lower Thoracic Vertebrae Thoracolumbar Fascia Iliac Crest Insertion Floor of Intertubercular Groove of Humerus Latissimus Dorsi axio appendicular thoraco appendicular originates posteriorly on back travels anteriorly later any
Action Extend Humerus at Shoulder Joint Adduct Humerus Medially Rotate Humerus Raises Body During Climbing Innervation Thoracodorsal Nerve https://www.tripadvisor.com.sg/LocationPhotoDirectLink-g60403-d4406418-i86650920-Dells_Lumberjack_Show-Wisconsin_Dells_Wisconsin.html#86650920"><img alt="" src="https://media-cdn.tripadvisor.com/media/photo-s/05/2a/30/28/paul-bunyan-s-northwoods.jpg"/></a><br/>This photo of Dells Lumberjack Show is courtesy of TripAdvisor Latissimus Dorsi medial rotation be originates post a inserts ant
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Origin Transverse Processes: C1 – C4 Insertion Medial Border of Scapula - at level above spine of scapula Action Elevate Scapula Rotate Scapula – glenoid cavity down Innervation Dorsal Scapular Nerve Levator Scapulae
Minor Major Origin Rhomboid Minor Spinous Processes: C7 and T1 Rhomboid Major Spinous Processes: T2 – T5 Rhomboid Minor and Major Insertion Rhomboid Minor Medial Border of Scapula – at level of spine of scapula Rhomboid Major Medial Border of Scapula – at level below spine of scapula ovignates on vertebral column spinous process ysmaller squareshaped
Action Retract Scapula Rotate Scapula – glenoid cavity down Innervation Dorsal Scapular Nerve MINOR MAJOR Rhomboid Minor and Major
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Levator Scapulae Rhomboid Minor Rhomboid Major 4 2 2 4 TP: C1 – C4 Skip 2 SP: C7 – T1 SP: T2 – T5 Posterior Axioappendicular Extrinsic Shoulder Muscles 4224 rule first 4 vert skip as a
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Scapulohumeral Muscles (Intrinsic Shoulder) Supraspinatus Infraspinatus Teres Minor Subscapularis Deltoid Teres Major poriginate on scar g insert on numerus closely associated w shoulder joint
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Muscles of Rotator Cuff Supraspinatus Infraspinatus Teres Minor Subscapularis
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Proximal Humerus Posterior View Greater Tubercle - 3 Facets o Superior o Middle o Inferior Lesser Tubercle attachment point of thesemuscles Y
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Origin Supraspinous Fossa of Scapula Insertion Greater Tubercle of Humerus o Superior Facet Posterior View ROTATOR CUFF Scapulohumeral / Intrinsic Shoulder Muscle Muscles of Rotator Cuff Supraspinatus syperior to e p superior facet on greater tubercle of humerus
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Action Abduct Humerus Stabilize Shoulder Joint Innervation Suprascapular Nerve ROTATOR CUFF Posterior View Muscles of Rotator Cuff Supraspinatus i.e lifting arms originates inserts superiorly
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Origin Infraspinous Fossa of Scapula Insertion Greater Tubercle of Humerus o Middle Facet ROTATOR CUFF Posterior View Scapulohumeral / Intrinsic Shoulder Muscle Muscles of Rotator Cuff Infraspinatus en originates a inserts posteriorly lateral rotation
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Action Laterally Rotate Humerus Stabilize Shoulder Joint Innervation Suprascapular Nerve ROTATOR CUFF Posterior View Scapulohumeral / Intrinsic Shoulder Muscle Muscles of Rotator Cuff Infraspinatus
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Origin Lateral Border of Scapula Insertion Greater Tubercle of Humerus o Inferior Facet ROTATOR CUFF Posterior View Scapulohumeral / Intrinsic Shoulder Muscle Muscles of Rotator Cuff Teres Minor É É
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Action Laterally Rotate Humerus Stabilize Shoulder Joint Innervation Axillary Nerve Posterior View ROTATOR CUFF Muscles of Rotator Cuff Teres Minor originates d inserts posteriorly
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Origin Subscapular Fossa of Scapula Insertion Lesser Tubercle of Humerus Anterior View ROTATOR CUFF Scapulohumeral / Intrinsic Shoulder Muscle Muscles of Rotator Cuff Subscapularis of humerus cannon originates anteriorly inserts anteriorly medial rotation
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Action Medially Rotate Humerus Stabilize Shoulder Joint Innervation Upper Subscapular Nerve Lower Subscapular Nerve Anterior View ROTATOR CUFF Muscles of Rotator Cuff Subscapularis lie reach behind back in allows you to button shirt
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Scapula and Proximal Humerus Anterior View Scapula and Proximal Humerus Posterior View Subscapularis Supraspinatus Infraspinatus Teres Minor Muscles of Rotator Cuff
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Origin Lateral 1/3 of Clavicle Acromion of Scapula Spine of Scapula Insertion Deltoid Tuberosity of Humerus Scapulohumeral (Intrinsic Shoulder) Muscle Deltoid multi directional multi action origin unfed boney horseshoe error
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Action Anterior Deltoid Flex Humerus Medially Rotate Humerus Middle Deltoid Abduct Humerus Posterior Deltoid Extend Humerus Laterally Rotate Humerus Innervation Axillary Nerve Deltoid quiz test Q what does the deltoid do Sagittal plane lanteriovly
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Action: Action Adduction of Humerus Medial Rotation of Humerus Scapulohumeral / Intrinsic Shoulder Muscle Innervation Lower Subscapular Nerve Origin Lateral Border of Scapula – inferior aspect Insertion Intertubercular Groove of Humerus – medial lip Scapula and Proximal Humerus Posterior View Scapula, Clavicle and Proximal Humerus Anterior View Teres Major little brother to latissimus dorsi fibres go the same way just smaller dotted lines refer to other side of bone s originates posteriorly inserts anteriorly medial rotation
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Teres Major rhomboid minor rhomboid major sup vac pinatas infraspinatus teves minor teres major latissimus dorsi weaves to get to anterior aspect
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Scapula, Clavicle and Proximal Humerus Muscle Attachments Expect this for practical supraspinatus origin subscapular is insertion deltoid origin supraspinatu insertion subscapular is teres minor origin insertion tissinius agennan teres major clarify insertion insertion teres minor point on origin diagram teves major origin deltoid insertion pieces of clay attached tobone will have to identify which muscle attaches to area its action and or innervation
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