Arm + Cubital Fossa Flashcards
Deltoid Origin
Anatomical Horseshoe (Clavicle, Acromion, Scap Spine)
Deltoid Insertion
Humerus’ Deltoid Tuberosity
Deltoid Nerve
Axillary
Deltoid Unipennate Parts
Posterior, Anteior
Deltoid Multipennate Part
Middle Fibres
Multipennate Meaning
Multiple tendons = very very strong
Deltoid Post Fibre Movement
Extends, externally rotates, abducts/adducts arm
Deltoid Ant Fibres Movement
Flexes, Internally Rotates, Abducts/Adducts Arm
Deltoid Middle FIbres Movement
Abducts Arm
Teres Major Origin
Scapula Inferior Angle
Teres Major Insertion
Intertubercular Groove
Teres Major Nerve
Lower Subscapular
Teres Major Movemnt
Internal Rotation
Shunt Muscles ROle
Prevent unwanted inferior movement of humeral head at the shoulder joint, during loading (ie carrying heavy stuff)
Shunt Muscles
Deltoid, Short Head Biceps, Coracobrachialis, Long Head Triceps
Intertubercular Groove Insertions
Pec Major - Lat Dorsi - Teres Major (gangbang)
Deltoid Tuberosity Med or Lat?
Lat
Flexor Compartment Arm Muscles
Biceps, Coracobrachialis, Brachialis
Flexor Compartment Arm Nerve
Musculocutaneous
Extensor Compartment Arm Muscles
Triceps, Anconeus
Extensor Compartment Arm Nerve
Radial
Biceps Brachii Nerve
Musculocutaneous
Biceps Brachii Origin
- Long Head = Supraglenoid Tubercle
- Short head = Coracoid
Biceps Brachii Insertion
Radial Tuberosity + Bicipital Aponeuroses
Biceps Brachii Movements
Flex Elbow + Shoulder, Supinator
Brachialis Nerve
Musculocutaneous
Brachialis Origin
Distal Humerus
Brachialis Insertion
Ulna Tuberosity
Brachialis Movement
Elbow Flexor
Coracobrachialis Nerve
Musculocutaneous
Coracobrachialis Origin
Coracoid
Coracobrachialis Insertion
Opposite Deltoid Tuberosity on Humerus
Coracobrachialis movement
Adduction and Flexion of shoulder
Triceps Brachii Nerve
Radial
Triceps Brachii Origin
- Long Head = Infraglenoid Tubercle
- Lat/med Head = Humerus
Triceps Brachii Insertion
Ulna’s Olecranon
Tricpes Brachii Movements
Extends elbow and shoulder, adducts shoulder
Median Nerve Location Arm
Medial side, but travels towards midline (at midline by elbow)
Musculocutaneous Nerve Location Arm
Laterally, through coracobrachialis
Musculocutaneous Name after Innervating All Muscles
Lateral Cutaneous Nerve of Forearm
Ulnar Nerve Location Arm
Travels medially, goes posterior through medial intermuscular septum, returns anterior at the medial epichondyle
Axillary Nerve Location Arm
Leaves Axilla through Quadrangular Space and innervates its two muscles + Dermatome
Radial Nerve Location Arm
Leaves Axilla trough triangular interval, travels down midline. Goes anterior through the lateral intermuscular septum and remains anterior by the start of the forearm region
Triangular Space Borders
Teres minor (sup), Teres Major (inf), Long Head Triceps (lat), Scapula (med)
Quadrangular Space Borders
Teres minor (sup), Teres Major (inf), Humerus (lat), Long Head Triceps (med)
Triangular Interval Borders
Teres Major (sup), Long Head Triceps (med), Humerus (lat)
Profunda Brachii Path
Branches from brachial artery at radial groove, goes deep and lateral
Axillary Artery becomes brachial when
Teres major inf border
Brachial artery branches into
Radial and ulnar at elbow, Profunda brachii at radial groove
Recurrent Vessel
Flows along but reverse direction (U turn)
Co-lateral Vessel
Flows alongside
Cubital Fossa Location
Fossa of Elbow
Cubital Fossa Sup Border
Line between Lateral and Medial Epichondyles
Cubital Fossa Med Border
Pronator teres
Cubital Fossa Lat Border
Brachioradialis
Cubital Fossa Roof
Biceps Brachii Tendon
Cubital Fossa Floor
Brachialis Tendon
Cubital Fossa Components
Basilic and Cephalic Veins (Median Cubital Vein entirely in the cub fossa) and Musculocutaneous Nerve
Cephalic Vein Med or Lat?
Lat
Axillary -> Basilic vein when
Penetrating deep fascia
Where IV drip
Cephalic Vein