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KIN 265 - Exam 2
Cranial Nerves and Muscle Functions
92
Anatomy
Undergraduate 1
03/03/2026

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Term
Rectus Femoris (O/I)
Definition
Function: Tibia/fibula extension
Origin: Anterior inferior iliac spine
Insertion: Patella
Term
Vastus Lateralis (O/I)
Definition
Function: Tibia/fibula extension
Origin: Greater trochanter
Insertion: Patella
Term
Vastus Medialis (O/I)
Definition
Function: Tibia/fibula extension
Origin: Intertrochanteric line
Insertion: Patella
Term
Vastus Intermedius (O/I)
Definition
Function: Tibia/fibula extension
Origin: Femoral shaft
Insertion: Patella
Term
Sartorius (O/I)
Definition
Function: Thigh flexion, abduction, and lateral rotation
Origin: Anterior superior iliac spine
Insertion: Superior-medial tibia
Term
Biceps Femoris (O/I)
Definition
Function: Thigh extension and tibia/fibula flexion
Origin: Ichial tuberosity
Insertion: Head of fibula
Term
Semitendinosus (O/I)
Definition
Function: Thigh extension and tibia/fibula flexion
Origin: Ichial tuberosity
Insertion: Proximal shaft of tibia
Term
Semimembranosus (O/I)
Definition
Function: Thigh extension and tibia/fibula flexion
Origin: Ichial tuberosity
Insertion: Medial condyle of tibia
Term
Gluteus Maximus (O/I)
Definition
Function: Thigh extension
Origin: Coccyx
Insertion: Gluteal tuberosity of femur
Term
Gluteus Medius (O/I)
Definition
Function: Abduction of leg
Origin: External surface of ilium
Insertion: Greater trochanter of femur
Term
Gluteus Minimus (O/I)
Definition
Function: Abduction of leg
Origin: External surface of ilium
Insertion: Greater trochanter of femur
Term
Piriformis (O/I)
Definition
Function: External rotation of leg
Origin: Sacrum
Insertion: Greater trochanter of femur
Term
Biceps Brachii (O/I)
Definition
Function: Forearm flexion
Origin: Coracoid process of scapula
Insertion: Radius
Term
Triceps Brachii (O/I)
Definition
Function: Forearm extension
Origin: Posterior humerus
Insertion: Olecranon process of ulna
Term
Brachialis (O/I)
Definition
Function: Forearm flexion
Origin: Anterior humeral shaft
Insertion: Coracoid process of ulna
Term
Gastrocnemius (O/I)
Definition
Function: Plantarflexion
Origin: Medial and lateral condyles of the femur
Insertion: Achilles tendon
Term
Soleus (O/I)
Definition
Function: Plantarflexion
Origin: Superior tibia and fibula
Insertion: Calcaneus
Term
Sternocleidomastoid (O/I)
Definition
Function: Rotation and lateral flexion
Origin: Sternum/Clavicle
Insertion: Mastoid process of temporal bone
Term
Occipitofrontalis
Definition
Raising eyebrows and tensing scalp
Term
Corrugator Supercilli
Definition
Raising eyebrows and wrinkling forehead
Term
Orbicularis Oculi
Definition
Closes eye
Term
Orbicularis Oris
Definition
Moves lips
Term
Buccinator
Definition
Cheek muscles (Lateral)
Term
Superior Rectus
Definition
Moves eye up (Adduction)
Term
Lateral Rectus
Definition
Moves eyes away from nose (Abduction)
Term
Inferior Rectus
Definition
Moves eye down (Adduction)
Term
Medial Rectus
Definition
Moves eyes to nose (Adduction)
Term
Temporalis
Definition
Pulls lower jaw back
Term
Superior Oblique
Definition
Moves eye down (Lateral)
Term
Inferior Oblique
Definition
Moves eye up (Lateral)
Term
Masseters
Definition
Closes mouth
Term
Splenius Capitis
Definition
Tilts head backwards (Extension)
Term
Splenius Cervicis
Definition
Rotates and flexes neck (Rotation)
Term
Iliocostalis
Definition
Flexion, lateral flexion, and rotation of vertebral column
Term
Longissimus
Definition
Flexion, lateral flexion, and rotation of vertebral column
Term
Spinalis
Definition
Flexion, lateral flexion, and rotation of vertebral column
Term
External Abdominal Oblique
Definition
Lateral flexion and rotation at the waist
Term
Internal Oblique
Definition
Lateral flexion and rotation at the waist
Term
Transverse Abdominus
Definition
Pooping (Compression)
Term
Rectus Abdominus
Definition
Sitting up (Flexion)
Term
Quadratus Lumborum
Definition
Bending to the side (Lateral flexion)
Term
Internal Intercostal
Definition
Forceful breathing (Compression)
Term
External Intercostals
Definition
Breathing (Elevation)
Term
Subclavius
Definition
Stabilizes clavicle during shoulder movement (Depression)
Term
Pectoralis Minor
Definition
Rotates the shoulder anteriorly (Depression and rotation)
Term
Serratus Anterior
Definition
Pulls scapula anteriorly (Protracts)
Term
Trapezius
Definition
Elevates scapula and pulls shoulders together
Term
Rhomboid Major
Definition
Anchors the scapula during arm movement (Rotation)
Term
Rhomboid Minor
Definition
Anchors the scapula during arm movement (Rotation)
Term
Pectoralis Major
Definition
Flexion, adduction, and medial rotation of the humerus
Term
Latissimus Dorsi
Definition
Extension, adduction, and medial rotation of the humerus
Term
Deltoid
Definition
Abduction, flexion/extension, internal/external rotation of the humerus
Term
Supraspinatus
Definition
Abduction
Term
Infraspinatus
Definition
Extension and abduction
Term
Subscapularis
Definition
Medial rotation
Term
Flexor Carpi Radialis
Definition
Flexion and abduction
Term
Flexor Carpi Ulnaris
Definition
Flexion and adduction
Term
Palmaris Longus
Definition
Flexion
Term
Flexor Digitorum Superficialis
Definition
Flexion
Term
Flexor Pollicis Longus
Definition
Flexion
Term
Extensor Radialis Longus
Definition
Extension and abduction
Term
Extensor Carpi Radialis Brevis
Definition
Extension and abduction
Term
Extensor Carpi Ulnaris
Definition
Extension adduction
Term
Extensor Digitorum
Definition
Extension abduction
Term
Extensor Digiti Minimi
Definition
Extension
Term
Extensor Pollicis Longus
Definition
Extension
Term
Extensor Pollicis Brevis
Definition
Extension
Term
Psoas Major
Definition
Thigh flexion and lateral rotation
Term
Iliacus
Definition
Thigh flexion and lateral rotation
Term
Tensor Fascia Latae
Definition
Thigh abduction
Term
Adductor Brevis
Definition
Thigh adduction
Term
Adductor Longus
Definition
Thigh adduction
Term
Adductor Magnus
Definition
Thigh adduction
Term
Tibialis Anterior
Definition
Dorsiflexion and inversion
Term
Extensor Hallucis Longus
Definition
Dorsiflexion and big toe extension
Term
Extensor Digitorum Longus
Definition
Dorsiflexion and big toe extension
Term
Fibularis (peroneus) Longus
Definition
Plantarflexion and eversion
Term
Fibular (peroneus) Brevis
Definition
Plantarflexion and eversion
Term
Flexor Digitorum Longus
Definition
Flexion of toes
Term
Flexor Hallucis Longus
Definition
Flexion of big toe
Term
CN I(1): Olfactory Nerve
Definition
Smell
Term
CN II(2): Optic Nerve
Definition
Sight info
Term
CN III(3): Oculomotor Nerve
Definition
Eye muscles and constrict pupil in bright light
Term
CN IV(4): Trochlear Nerve
Definition
Superior eye muscles
Term
CN V(5): Tri(3)geminal Nerve
Definition
Sensation of face/eyes/teeth/tongue
Term
CN VI(6): Abducens Nerve
Definition
Lateral rectus muscle
Term
CN VII(7): Facial Nerve
Definition
Cheeks (motor function for face) and 2/3rd of tongue
Term
CN VIII(8): Auditory/Vestibulocochlear Nerve
Definition
Transmitting sound info and head movement
Term
CN IX(9): Glossopharyngea
Definition
Motor/sensory for upper throat
Term
CN X(10): The Vagus Nerve
Definition
Everything, swallowing, decreases heart rate, speaking
Term
CN XI(11): Spinal Accessory Nerve
Definition
Sternocleidomastoid and trapezius
Term
CN XII(12): Hypoglossal Nerve
Definition
Tongue muscles
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