Portage Learning BIOD 151 A&P 1 Lab 6Key Terms A & P 1 - Lab 6 Key Terms. Portage Learning BIOD 151 A&P 1 Lab 6Key Terms A & P 1 - Lab 6 Key Terms Muscular System: Appendicular Muscles  Any muscle that acts on our arms, legs, shoulder blade, pectoral an

Portage Learning BIOD 151 A&P 1 Lab 6Key Terms A & P 1 - Lab 6 Key Terms Portage Learning BIOD 151 A&P 1 Lab 6Key Terms A & P 1 - Lab 6 Key Terms Portage Learning BIOD 151 A&P 1 Lab 6Key Terms A & P 1 - Lab 6 Key Terms Portage Learning BIOD 151 A&P 1 Lab 6Key Terms A & P 1 - Lab 6 Key Terms Portage Learning BIOD 151 A&P 1 Lab 6Key Terms A & P 1 - Lab 6 Key Terms Muscular System: Appendicular Muscles  Any muscle that acts on our arms, legs, shoulder blade, pectoral and pelvic girdle  Trapezius - large fan shaped muscle. o Action to elevate and depress the shoulder. o Stabilizes scapula, retracts and rotates the scapula. o Innervation - Accessory Nerve (CN XI)  Serratus Anterior - protraction of the scapula. o Works in movement of reaching forward or pushing. o Works with pectoralis minor to draw scapula laterally. o Located lateral/superior side of chest wall. Superior to external abdominal oblique.  Pectoralis Minor - draws the scapula laterally and forward. o Accessory muscle to breathing during childbirth. o Medial/lateral pectoral nerve  Pectoralis Major - large muscle in chest. o Job to flex, adduct, and medially rotate the humerus. Raises the humerus up, in, and medially rotate. o Medial/Lateral Pectoral Nerve  Latissimus Dorsi - adducts and medially rotate the humerus. [large muscle of the back, wraps] o Extension of the shoulder (pulling down an object) o Backward swing of the arm (bowling) o Attachment point at humerus  Deltoid - large muscle in top part of humerus (anterior, lateral, posterior) o Anterior - flex and medially rotate the shoulder o Lateral - abduct the arm (take away) o Posterior - extend and laterally rotate the shoulder (external/laterally rotate shoulder, pull arm back) o Axillary Nerve  Teres Major - act in shoulder extension and medial rotation o Lower Subscapular Nerve Rotator Cuff (SITS): work in stabilizing the humeral head inside the glenoid cavity in the scapula  Supraspinatus - abduction of the shoulder, external/lateral rotation. o Will resist downward slippage of the humeral head. o Subscapular Nerve  Infraspinatus - will function in lateral/external rotation of shoulder. Will prevent humeral head from slipping upward. o Subscapular Nerve  Teres Minor - lateral/external rotation of the shoulder. Prevents upward slippage. o Axillary Nerve  Subscapularis - only SITS muscle that does not work in ext/lat rotation. o It works on medial rotation of shoulder. Anterior surface of scapula in subscapular fossa. o Lower Subscapular Nerve Forearm/Elbow: Biceps Brachii - large muscle anterior surface upper arm. Main action is supination of the forearm and will assist in elbow flexion and will assist in shoulder flexion. o Musculocutaneous Nerve  Brachialis - prime muscle that performs elbow flexion. Deep to the biceps brachii. o Musculocutaneous nerve  Brachioradialis - elbow flexion (starts above the elbow and attaches in the middle of the forearm) o Radial Nerve  Triceps Brachii - posterior part of the upper arm. Elbow extension. Assist in shoulder extension and abduction of the humerus. o Radial nerve Wrist, hand, and fingers:  Flexor Carpi Radialis - flexes wrist in the radial side. Radial deviation. (lateral-ish) o Median Nerve  Palmaris Longus - medial to flexor carpi radialis. Anchors the skin and the fascia of the palmar region. Very weekly developed and absent in a large part of the population o Median nerve  Flexor Carpi Ulnaris - flex wrist. Ulnar deviation. Medial aspect of forearm. o Ulnar Nerve  All in the anterior surface of the forearm.  Median nerve (passes through wrist) - affected in carpal tunnel. Numbness in thumb and first 2-4 digits.  Flexor Pollicis Longus - thumb flexion. o Median nerve  Extensor Carpi Radialis - extend the wrist. Found on the lateral component of the forearm. Radial deviation. o Radial nerve  Extensor Digitorum - wrist extension. o Posterior Interosseous Nerve  Extensor Carpi Ulnaris - ulnar deviation. Wrist extension. o Posterior interosseous nerve  Extensor Digiti Minimi - wrist extension and extension of digit 5 o Posterior interosseous nerve  Abductor Pollicis Longus - abduction of the thumb. Small muscle, lateral aspect of the forearm. o Posterior interosseous nerve Hip, knee, ankle:  Gluteus Maximus - large muscle on the posterior side of the hips o Hip extension - main role o Hip abduction o Picking up our body when we bend (elevate trunk) o Inferior gluteal nerve  Gluteus Medius - smaller and deeper to gluteus maximus.  Gluteus Minimus - deeper to gluteus medius. o Hip abduction, medial rotation of hip joint. (medius and minimus) o Superior gluteal nerve (medius and minimus)  Tensor Fasciae Latae - knee extension. Lateral rotation of the tibia.o Iliotibial Tract - attaches to this connective tissue. It will insert around the knee joint. o Motions of the hip: abduction and medial rotation of femur. o Superior gluteal nerve  Gracilis - located very medially along the thigh. Hip and knee. Knee flexion and medial rotation.  Pectineus - flexion and adduction of the hip. Anterior surface of the hip. o Femoral Nerve  Adductor Longus - adduction of the hip and medial rotation. Aid in hip flexion. Inferior, medial to pectineus o Obturator nerve  Adductor Brevis- adduction of the hip and medial rotation.  Adductor Magnus - adduction of the hip and medial rotation. Distal and medial to adductor longus portion. o Obturator nerve and tibial nerve (partially)  Sartorius - longest muscle in the body. From outer thigh to inner knee. Abduction and lateral rotation of the hip and hip and knee flexion. o Femoral nerve Quadriceps Femoris:  Rectus Femoris - large one. Two functions: performs hip flexion and knee extension. (help kick ball)  Vastus Lateralis - knee extension  Vastus Medialis - knee extension  Vastus Intermedius - knee extension. Deep to rectus femoris.  All perform knee extension. Femoral nerve. Hamstrings:  Knee flexion  Biceps Femoris - knee flex, hip ext. large muscle.  Semimembranosus - medial to biceps femoris  Semitendinosus - entre medio de los dos  Tibial nerve Ankle, foot, and toes:  Tibialis Anterior - dorsiflexion and inversion of foot/ankle o Resist a backward tipping motion (bus stops) o Peroneal Nerve (deep tibial)  Extensor Digitorum Longus - tendon splits and covers digits 2-5 o Extend the toes and help dorsiflex the foot/ankle. Lateral to tibialis anterior. o Peroneal Nerve Calf: collectively - Triceps Surae  Gastrocnemius - posterior aspect of lower leg (calf). Muscle in lower part of the calf (you can see when stand up on toes). Plantarflexion of the ankle. Knee flexion. o Tibial nerve  Soleus - deep to the gastrocnemius. Plantarflexion. o Tibial Nerve  Achilles Tendon - gastrocnemius converges into this tendon and attach into calcaneus.Pig:  1st pectoralis major. Anterior chest wall.  Serratus anterior. Deep in chest wall (ni se ve)  Side: triceps muscles in back of arm. Elbow extension. 3 components.  Quadriceps, anterior surface of thigh. Most superficial arriba rectus femoris, vastus medialis medially, and laterally vastus lateralis. No se ve vastus intermedius.  Tibialis anterior pointer is underneath. Dorsiflex ankle and keep balance.