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90 Cards in this Set

  • Front
  • Back
__ located between the pons of the hindbrain and the cerebral hemispheres of the forebrain
Mesencephalon
Mesencephalon make up 2 major portions: ___
Tectum
Cerebral Peduncles
__also called the quadrigeminal plate
Tectum
Tectum made up of 4 rounded bodies called ___
Colliculi or quadrigeminal bodies
Tectum has 2 ___and 2 ___
Superior colliculi
Inferior colliculi
Superior colliculi function
relay nuclei in the visual pathway
Anatomically, superior colliculi are ___
Nuclei
Inferior colliculi function
relay nuclei in the auditory pathway
Anatomically, inferior colliculi are ___
Nuclei
Tectum is the ___
Dorsal aspect of the midbrain
__are ventral aspect of the midbrain
Cerebral Peduncles
Cerebral Peduncles divided into 3 major portions: ___
Tegmentum
Crus cerebri
Substantia nigra
__a continuous elongated mass of grey mater extending from the upper midbrain down through the pons and medulla
Tegmentum
__forms the floor of the 4th ventricle
Tegmentum
Tegmentum functions
Involved with sensory relay pathways.
Tegmentum function
Involved with motor and sensory nuclei associated with cranial nerve III and IV
Tegmentum function
Involed with the reticular activating system which has to do with alertness, arousal, and wakefulness.
__is the most ventral portion of the cerebral peduncle
Crus Cerebri
__contains corticofugal fibers (upper motor neurons)
Crus cerebri
__efferent in nature in that the motor fibers are leaving the brain
Crus cerebri
__classified as grey mater
Substantia nigra
__contains fibers going in both directions (efferent and afferent) as well as a source for the neurotransmitter dopamine
Substantia nigra
__anatomically separates the tegmentum from the crus cerebri
Substantia nigra
Supinator mm originate ___
Lateral epicondyle of humerus
Radial collateral ligament and ulnar crest.
Supinator mm insertion: ___
Proximal 1/3 of radius
Supinator mm function: __
Supination of forearm
Supinator mm innervation:__
Radial nerve
Abductor pollicis longus mm origin: __
Middle 1/3 of ulna, radius, and interosseus membrane
Abductor pollicis longus mm insertion: ___
1st metacarpal (base)
Abductor pollicis longus mm function: ___
Abduction and extension of thumb
Abductor pollicis longus mm innervation: ___
Radial nerve
Extensor pollicis brevis mm origin: ___
Distal 1/3 of radius and interosseus membrane (post surfaces)
Extensor pollicis brevis mm insertion: ___
Proximal phalanx of thumb
Extensor pollicis brevis mm function: __
Extension of thumb
Externsor pollicis brevis mm innervation: ____
Radial nerve
Extensor pollicis longus mm origin: ___
Middle 1/3 of ulnar and interosseus membrane
Extensor pollicis longus mm insertion: ___
Distal phalanx of thumb
Extensor pollicis longus mm function: __
Extension of thumb
Extensor pollicis longus mm innervation: ___
Radial nerve
Extensor indicis mm origin: ___
Distal 1/3 of ulnar and interosseus membrane
Extensor indicis mm insertion: ____
Extensor expansion of index finger (2nd)
Extensor indicis mm function: ____
Extension of index finger (2nd)
Extensor indicis mm innervation: ___
Radial nerve
Pronator teres mm origin: ___
Humeral head: medial epicondyle of humerus.
Ulnar head: coronoid process of ulna
Pronator teres mm insertion: ___
Middle portion of radius (lateral surface)
Pronator teres mm function: ___
Pronation and flexion of forearm
Pronator teres mm innervation: ___
Median nerve
Flexor carpi radialis mm origin: ___
Medial epicondyle of humerus
Flexor carpi radialis mm insertion: ___
2nd metacarpal bone (base)
Flexor carpi radialis mm function: ___
Flexion and abduction of wrist and flexion of forearm
Flexor carpi radialis mm innervation: ___
Median nerve
Palmaris longus mm origin: ___
Medial epicondyle of humerus
Palmaris longus mm insertion: ___
Palmar aponeurosis
Palmaris longus mm function: ___
Flexion of wrist
Palmaris longus mm innervation: ___
Median nerve
Flexor carpi ulnaris mm origin: ___
Humeral head: medial epicondyle of humerus.
Ulnar head: olecranon process and proximal 2/3 of ulna (posterior surface)
Flexor carpi ulnaris mm insertion: __
Pisiform, hamate, and 5th metacarpal
Flexor carpi ulnaris mm function: ____
Flexion and adduction of wrist
Flexor carpi ulnaris mm innervation: __
Ulnar nerve
Flexor digitorum superficialis mm origin: ___
Medial epicondyle of humerus, coronoid process of ulna and proximal 1/2 of radius
Flexor digitorum superficialis mm insertion: __
Middle phalanges of fingers 2-5
Flexor digitorum superficialis mm function: __
Flexion of middle phalanges of fingers 2-5 and weak flexion of forearm and wrist
Flexor digitorum superficialis mm innervation: ___
Median nerve
Flexor digitorum profundus mm origin: ___
Proximal 3/4 of ulna and interosseus membrane
Flexor digitorum profundus mm insertion: __
Bases of distal phalanges of fingers 2-5
Flexor digitorum profundus mm innervation: __
Medial half of muscle (ulnar nerve), lateral half of muscle (median nerve)
Pronator quadratus mm origin:___
Distal 1/4 of ulna
Pronator quadratus mm insertion: ___
Distal 1/4 of radius
Pronator quadratus mm function: __
Pronation of forearm
Pronator quadratus mm innervation: ___
Median nerve
Flexor pollicis longus mm origin:____
Radius
Flexor pollicis longus mm insertion: ___
Base of distal phalanx of thumb
Flexor pollicis longus mm function: ___
Flexion of thumb and wrist
Flexor pollicis longus mm innervation: ___
Median nerve
Brachioradialis mm origin: __
Lateral supracondylar ridge of humerus
Brachioradialis mm insertion: ___
Styloid process of radius
Brachioradialis mm function: ___
Flexion of forearm
Brachioradialis mm innervation: __
Radial nerve
Extensor carpi radialis longus mm origin: ___
Lateral supracondylar ridge of humerus
Extensor carpi radialis longus mm insertion: ___
2nd metacarpal (base)
Extensor carpi radialis longus mm function: __
Extension and abduction of hand and flexion of forearm
Extensor carpi radialis longus mm innervation: __
Radial nerve
Extensor carpi radialis brevis mm origin: __
Lateral epicondyle of humerus
Extensor carpi radialis brevis mm insertion: __
3rd metacarpal (base)
Extensor carpi radialis brevis mm function: ___
Extension and abductions of hand
Extensor carpi radialis brevis mm innervation: ___
Radial nerve
Extensor digitorum mm origin: ___
Lateral epicondyle of humerus
Extensor digitorum mm insertion: ___
Middle and distal phalanges of fingers 2-5 and extensor expansions of same fingers
Extensor digitorum mm function: ___
Extension of phalanges of fingers 2-5 and extension of hand
Exntensor digitorum mm innervation: ___
Radial nerve