PRACTICAL II Flashcards
Frontalis
O = Cranial aponeurosis I = Skin of eyebrows and root of nose A = Raises eyebrows
Occipitalis
O = Occipital and temporal bones I = Cranial aponeurosis A = Pulls scalp posteriorly
Orbicularis Oculi
O = Frontal and maxillary bones I = Inside of eyelid A = Draws eyelids inferiorly
Orbicularis Oris
O = Madible and maxillary bones I = Skin/muscle around mouth A = Closes mouth and protrudes lips.
Zygomaticus (major and minor)
O = Zygomatic bone I = Skin/ muscle at corner of map A = Elevates lateral corner of the mouth to smile
Mentalis
O = Mandible I = Skin of chin A = Protrudes lower lip and wrinkles the chin
Masseter
O = Zygomatic Arch and maxillary bone I = Angle and ramus of mandible A = Elevates mandible
Temporalis
O = temporal fossa of temporal bone I = coronoid process of mandible A = Elevates and retracts jaw
Buccinator
O = Posterior maxillary bone and mandible I = Orbicularis Oris A = Compresses cheeks as in whistling, blowing or sucking.
Sternocleidomastoid
O = Manubrium of sternum and the clavicle
I = Mastoid process of temporal bone
A = Bilateral contraction: flexion of the neck forward
Unilateral contraction: lateral flexion, tilting head slightly upward and face to opposite side.
External Intercostals
O = Inferior border of each rib I = Superior border of the rib below A = Pulls ribs to one another to elevate thoracic cavity, inspiration.
Internal Intercostals
O = Superior border of each rib I = Inferior border of rib above A = Draws ribs together to depress thorax, expiration
Diaphragm
O = Xiphoid process of sternum and costal cartilage of last 6 ribs and lumbar vertebra. I = Central tendon of diaphragm A = Flattens to increase the volume of the thoracic cavity, inspiration
Rectus abdominis
O = pubic crest and symphysis I = xiphoid process and costal cartilages of ribs 5-7 A = flexes and rotates vertebral column
External Oblique
O = ribs 4-12 I = Iliac crest, linea alba, pubic crest and tubercles A = Flexes and rotates vertebral column
Internal Oblique
O = Iliac crest, lumber fascia I = Linea alba, pubic crest, inferior borders of ribs 9-12 A = Flexes and rotates vertebral column
Transversus Abdominus
O = Iliac crest, lumber facia, inguinal ligament I = Linea alba and pubic crest A = Flexes and rotates vertebral column
Erector Spinae (iliocostalis, longissimus, and spinalis)
O = Iliac crest, transverse process of cervical, thoracic, and lumbar vertebrae, and or ribs 3-6. I = Ribs and transverse processes of vertebrae about 6 segments above origin. A = Extends and laterally rotates the vertebral column
Pectoralis Major
O = Clavicle, sternum and cartilage of ribs 2-6 I = Fibers converge to form a short tendon that inserts into the intertubercular groove of the humerus A = Flexes, adducts and medially rotates the arm at the shoulder.
Deltoid
O = Acromion and spine of scapula, lateral third of clavicle. I = Deltoid tuberosity of humerus A = Abduction of the arm at the soulder
Serratus Anterior
O = 1st to 8th rib I = Vertebral border of scapula A = Protracts the shoulder, upward rotation of the scapula
Pectoralis minor
O = 3rd, 4th, 5th rib near costal cartilages I = Coracoid process of scapula A = Adducts and protracts the shoulder
Subscapularis
O = subscapular fossa I = Lesser tubercles of humerus A = Medially rotates the arm
Leavator Scapulae
O = Transverse process of 4 cervical vertebrae I = Vertebral border of scapula A = Elevates the scapula
Trapezius
O = Occipital bone, ligamentum nuchae, spines of C7 and thoracic vertebrae. I = Acromion and spinous process of scapula, lateral third of clavicle. A = Extends the neck, rotates and adducts scapula, elevates or depresses the scapula
Latissimus dorsi
O = Spinous process of lower 6 thoracic vertebrae, all lumbar vertebrae, ribs 8-12 and lumbodorsal fascia I = Intertubercular grove of humerus A = Extends, adducts and medial rotates the shoulder
Supraspinatus
O = Supraspinous fossa of the scapula I = Greater tubercle of humerus A = Abducts the arm
Infraspinatus
O = Infraspinous fossa of the scapula I = Greater tubercle of humerus A = Lateral rotation of arm
Teres minor
O = Lateral margin of scapula I = Greater tubercle of humerus A = Lateral rotation of arm
Teres major
O = Inferior angle of scapula I = Intertubercular groove of humerus A = Extension, adduction and medial rotation of the arm
Rhomboids, major and minor
O = Spinous process of C7 and T1 through T5 I = Medial border of scapula A = Adducts scapula and rotates it downward
Triceps brachii
O = Long head at inferior margin of glenoid cavity, lateral head at posterior side of humerus, and medial head at distal radial groove of humerus. I = Olecranon process of the ulna A = Extends the forearm at the elbow
Anconeus
O = lateral epicondyle of humerus I = Lateral side of olecranon process of ulna A = Abducts the ulna during forearm pronation, and extends elbow.
Biceps brachii
O = Short head at coracoid process of scapula, long head at tubercle superior to glenoid cavity of scapula. I = Radial tuberosity A = Flexes the forearm at the elbow and supinates the forearm.
Brachioradialis
O = distal end of humerus I = Coronoid process of ulna A = Flexes the forearm
Brachialis
O = Distal portion of humerus I = Coronoid process of ulna A = Flexes the forearm
Pronator Teres
O = Medial epicondyle of humerus and coronoid process of ulna I = Shaft of the radius A = Pronates the forearm
Supinator
O = Lateral epicondyle of humerus and proximal ulna I = Proximal end of radius A = Supinates the forearm at the elbow
Flexor carpi radialis
O = Medial epicondyle of humerus I = Base of 2nd and 3rd metacarpals A = Flexes hand at wrist, and abducts hand at wrist.
Palmaris longus
O = Medial epicondyle of humerus I = Fascia and skin of palm A = Flexes hand at wrist, tenses skin and fascia of palm
Flexor carpi ulnaris
O = Medial epicondyle of humerus, posterior surface of ulna I = 5th metacarpal base, pisiform and hamate A = Flexes and adducts hand at wrist
Flexor digitorum superficialis
O = Medial epicondyle of humerus, coronoid process of ulna, shaft of radius I = Middle phalanges of 2nd through 5th digits A = Flexes hand and middle phalanges of 2nd-5th digits.
Flexor pollicis longus
O = Anterior surface of radius I = Distal phalanx of thumb A = Flexes thumb
Flexor digitorum profundus
O = surface of ulna, and coronoid process I = Distal phalanges of 2nd-5th digits A = Flexes distal phalanges
Extensor carpi radialis longus
O = Supracondylar ridge of the humerus I = base of 2nd metacarpal A = Extends and abducts the hand at wrist
Extensor carpi radialis brevis
O = Lateral epicondyle of the humerus I = Base of 3rd metacarpal A = Extends and abducts hand at wrist
Extensor digitorum
O = Lateral epicondyle of the humerus I = Four tendons onto distal phalanges of 2nd-5th digits A = Extends the digits at the hand
Extensor carpi ulnaris
O = Lateral epicondyle of the humerus I = Base of 5th metacarpal A = Extends and adducts hand at wrist
Abductor pollicis longus
O = Posterior shaft of radius and ulna I = Trapezium and 1st metacarpal A = Abducts and extends thumb
Iliopsoas
O = Iliacus at the iliac fossa, iliac crest, and lateral sacrum; psoas major at bodies and transverse processes of t12 and lumbar vertebrae I = On and just below the lesser trochanter of the femur A = Flexes the thigh, flexes the trunk and laterally flexes the vertebral column
Sartorius
O = Anterior superior iliac spine I = Medial side of proximal tibia by an aponeurosis A = Flexes, abducts, and laterally rotates the thigh, flexes the leg at the knee
Rectus Femoris
O = Anterior inferior iliac spine, superior margin of the acetabulum I = Tibial tuberosity and patella A = Extends the leg at the knee and flexes thigh at hip
Tensor fascia latae
O = Anterior side of iliac crest and anterior superior iliac spine I = Iliotibial tract A = Flexes, abducts, medialy rotates the thigh
Gracilis
O = Inferior ramus and body of pubis I = Medial surface of tibia inferior to medial condyle
Vastus lateralis
O = Greater trochanter, intertrochanteric line and linea aspera I = Tibial tuberosity and patella A = Extends the leg at the knee
Vastus medialis
O = Linea aspera and intertrochanteric line I = Tibial tuberosity and patella A = Extends the leg at the knee
Vastus intermedius
O = Anterior and lateral surface of femur I = Tibial tuberosity and patella A = Extends the leg at the knee
Adductor longus
O = Pubis near pubic symphysis I = Linea aspera A = Adducts, medially rotates, and flexes the thigh at the hip
Adductor magnus
O = Ischial and pubic rami, ischial tuberosity I = Linea aspera and adductor tubercle of the femur A = Adducts, medially rotates, and flexes the thigh at the hip
Gluteus maximus
O = Posterior side of the ilium, sacrum and coccyx I = Gluteal tuberosity of femur, iliotibial tract A = Extends the thigh when it is elevated (as in climbing stairs), Laterally rotates and abducts the thigh
Gluteus medius
O = Upper lateral surface of the ilium I = Greater trochanter of femur A = Abducts and medially rotates the thigh
Biceps femoris
O = Long head at ischial tuberosity; short head at linea aspera and distal end of femur I = head of fibula and lateral condyle of tibia A = Extends the thigh at the hip
Semitendinosus
O = ischial tuberosity I = Medial side of the proximal tibia A = Extends the thigh at the hip, laterally rotates the thigh at the hip, flexes the leg at the knee
Semimbranosus
O = Ischial tuberosity I = Medial side of the proximal tibia A = Extends the thigh at the hip, flexes the leg at the knee, medially rotates the thigh
Tibialis anterior
O = Lateral condyle and superior shaft of tibia I = By a tendon onto cuneiform and 1st metatarsal A = Dorsiflexion, inverts foot, supports logitudinal arch
Extensor digitorum longus
O = Lateral condyle of tibia, proximal fibula I = By a tendon that divides into 4 to insert at middle and distal phalanges of digits 2-5 A = Extension of digits, dorsifelxion
Extensor hallucis longus
O = Shaft of fibula I = by a tendon onto the distal phalanx of digit 1 A = Extends big toe, dorsiflexion
Fibularis longus
O = Head and shaft of fibula I = By a long tendon to 1st metatarsal and medial cuneiform A = Plantar flexion and eversion of the foot
Gastrocnemius
O = Two heads, medial and lateral condyles of the femur I = Calcaneus by way of the calcaneal tendon A = Plantar flexes the foot when knee is extended; flexes the leg at the knee.
Soleus
O = Proximal end of tibia and fibula I = Calcaneus by way of the calcaneal tendon A = Plantar flexes the foot
Popliteus
O = Lateral condyle of femur I = Proximal end of the tibia A = Flexes and rotates leg medially
Tibialis Posterior
O = superior part of tibia and fibula I = tarsals, metatarsals 2-4 A = inverts foot, plantar flexes foot
Flexor digitorum longus
O = Posterior surface of tibia I = Distal phalanges of 2-5th digits A = Flexes the digits , plantar flexes and inverts the foot
Flexor hallucis longus
O = Shaft of fibula I = Distal phalanx of 1st digit A = Flexes the big toe, inverts the foot
Fibularis brevis
O = Distal part of shaft of fibula I = by a tendon onto the proximal end of the 5th metatarsal A = Plantar flexion and eversion of the foot
Dendrites
Branched processes at proximal end of neuron. They form synapses with axon terminals of other neurons . Stimulated by proceeding cell and conducts impulses to cell bodies.
Axon
Single process from cell body but may branch into collateral axons. Carries impulse away from cell body and terminates in axon terminals.
Axon hillock
Widened base of axon. Point where axon arises from cell body.
Myelin Sheath
Axon covering of some peripheral neurons. Composed of lipoprotein molecules within Scwann Cells. Outer layer is called neurilemma.
Axon terminals
Branched distal end of axon that forms synapses with dendrites of next cell or neuromuscular junction. Stores neurotransmitter.