Blood and Nerve Tracing
This blood pathway supplies Serratus Anterior
What is Subclavian A. --> Axillary A. --> Lateral Thoracic A. --> Serratus Anterior M.?
This term describes movement around an axis
What is Rotation?
The Trapezius M.
O: nuchal ligament, superior nuchal line of occipital b., spinous process (C7-T12)
I: lateral 1/3 of clavicle, acromion, scapular spine
A: scapular elevation, retraction, and depression
I: spinal accessory n. and spinal nerves C3-C4
Artery: transverse cervical a.
This motor nerve arises from C5 of the brachial plexus and innervates the rhomboids and levator scapulae
What is the Dorsal Scapular N.?
These three muscles, from lateral to medial, make up the Erector Spinae
What are the Iliocostalis, Longissimus, and Spinalis M.?
The prime mover in flexion of the glenohumeral joint follows this blood pathway
What is the subclavian a. --> axillary a. --> thoracoacromial a. --> deltoid branch --> anterior deltoid m.
This movement pattern describes throwing a ball overhead
What are shoulder flexion, shoulder abduction, elbow flexion, shoulder lateral rotation, shoulder adduction, elbow extension, and scapular protraction?
The Infraspinatus M.
O: Infraspinous Fossa
I: Middle Facet of Greater Tubercle of Humerus
A: Lateral Rotation of Glenohumeral Joint
I: Suprascapular N.
Artery: Suprascapular A. and Circumflex Scapular A.
The Medial Antebrachial Cutaneous N. gives rise to this type of neural communication at the medial skin of the forearm
What is Sensory?
This afferent nerve is responsible for carrying information towards the CNS
What is the dorsal root?
This anatomical term of movement is derived from this neural pathway: motor cortex of cerebrum --> ventral horn --> ventral root --> spinal nerve C5 --> ventral ramus --> superior trunk --> anterior division --> lateral cord --> lateral pectoral n.
This structure starts around L1, where the spinal cord is spilt into many nerve roots
What is the Cauda Equina?
The Rhomboid Minor M.
O: Spinous Process (C7-T1)
I: Medial Border of Scapula at Scapular Spine
A: Scapular Retraction and Elevation
I: Dorsal Scapular N.
Artery: Dorsal Scapular A.
This mixed nerve innervates the Deltoid, Teres Minor, and posterior/lateral skin superficial to the Deltoid
What is the Axillary N.?
This type of uniaxial, synovial joint permits rotation at the Atlantoaxial joint
What is a Pivot Joint?
The triangular interval is necessary for this blood pathway when supplying the Triceps Brachii M.
What is the subclavian a. --> axillary a. --> brachial a. --> profunda brachii a. --> triceps brachii m.
This type of movement describes the sole of the foot tilting towards the midline of the body
What is Inversion?
The Pectoralis Major M.
O: Medial Half of Clavicle, Sternum, Costal Cartilages 1-7
I: Lateral Lip of Intertubercular Sulcus
A: Adduction and Medial Rotation of Humerus
I: Medial and Lateral Pectoral N.
Artery: Thoracoacromial a. (pectoral branch), Lateral Thoracic a.
The efferent fibers of this nerve innervate these key medial rotator muscles of the glenohumeral joint
What is the Lower Subscapular N.?
What are the Subscapularis and Teres Major?
This dermatome governs the cutaneous region where some people have an innie or an outie
What is the T10 Dermatome?
This afferent pathway is followed when stimulating the skin overlaying the superior aspect of the glenhumeral joint
What is the skin of the cutaneous dermatome C4 --> Supraclavicular N. --> Ventral Ramus --> Spinal Nerve C4 --> Dorsal Root --> Dorsal Root Ganglion --> Dorsal Horn --> Sensory Cortex of Cerebrum
The Long Head of the Triceps Brachii M., Teres Major M., and Teres Minor M. make up the boundaries for this region
What is the Triangular Space?
The Serratus Anterior M.
O: Lateral region of ribs 1-9
I: Anterior Surface of Medial Border of Scapula
A: Scapular Protraction and Superior Rotation of Glenoid Cavity
I: Long Thoracic N.
Artery: Lateral Thoracic a. and Thoracodorsal a.
This mixed nerve innervates sensory information when the ventral side of the 1st, 2nd, 3rd, and distal region of the 4th digit is stimulated, as well as the distal dorsal region of those digits, and motor information during wrist flexion
What is the Median N.?
This term serves as a better, more appropriate name for the Humerus B.
What is the Brachial B.?