Shark Nervous System

Zoology 328 with Hill at Michigan State University

About this deck

By: Samantha Cowell
Textbook: Comparative Anatomy
Comparative Anatomy of the Vertebrates
Created: 2011-04-19
Size: 32 flashcards
Views: 23

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Olfactory sac

lined with sensory epithelium for olfaction

olfactory bulb

anterior-most part of the brain; receives sensory input from olfactory sacs

olfactory nerve (I)

very short; carries sensory information from olfactory sac to olfactory bulb

olfactory tract (I)

carries sensory information from olfactory bulbs to cerebral hemishpheres

cerebral hemispheres

main center for integration of information from other parts of the brain

third ventricle

enlarged part of central canal of brain within the diencephalon

tela choroidea

thin roof over third and fourth ventricles which secretes and absorbs cerebrospinal fluid

optic tectum

enlarged roof of mesencephalon that processes visual information

cerebellum

main center for coordination of movement

auricles of the cerebellum

part of the cerebellum; help in coordination of movement

fourth ventricle

enlarge part of central canal of brain within the medulla oblongata

medulla oblongata

posterior-most region of the brain, involved in regulation of internal homeostasis of the body

optic tract or nerve (II)

carries sensory information fromt the retina of the eye to the diencephalon

oculomotor nerve (III)

carries motor signals to ventral oblique, ventral rectus, dorsal rectus and medial rectus muscles of the eye

trochlear nerve (IV)

carries motor signals to the dorsal oblique muscle of the eye

trigeminal nerve (V)

both motor and sensory; innervates mandible and front of head with several branches, some of which combine with branches of the facial nerve

superficial opthalmic branch

trigeminal plus facial; sensory; innervates lateral surface of the rostrum, later lines and ampullae of Lorenzini

deep opthalmic branch

trigeminal: sensory from lateral surface of rostrum and eye ball

mandibular branch

trigeminal: both motor and jaw muscles, and sensory from skin over lower jaw

maxillary branch

trigeminal: sensory, form upper jaw region and ventral part of rostrum. combines with buccal branch of the facial to form the infraorbital trunk.

infraorbital trunk (V & VII)

maxiallry branch of trigeminal and buccal branch of facial

abducens (VI)

carries motor signals to the lateral rectus muscle of the eye

facial nerve (VII)

mixed motor and sensory; serves lateral line and ampullae of Lorenzini, hyoid region, lining of the mouth, with the following branches, some of which combine with branches of the trigeminal.

VII: superficial opthalmic branch

facial plus trigeminal: both motor and sensory; innervates mandible and front of head with several branches, some of which combine with branches of the facial nerve. (same as trigeminal nerve)

VII: buccal branch

facial: sensory from lateral lines and ampullae of Lorenzini. combines with maxillary branch of trigeminal to form infraorbital trunk.

VII: hyomandibular branch

facial: both motor to hyoid muscles, and sensory from lateral line canals and lining of mouth

vestibulochochlear (VIII) (auditory, acoustic)

carries sensory information from vestibular canals to brain

glossopharyngeal (IX)

both sensory and motor serving muscles and sensory nerve endings (including lateral line canals) of the first gill pouch and neighboring regions of the pharynx

vagus nerve (X)

both sensory and motor serving the muscles and sensory nerve endings including lateral line canals of gill pouches 2 through 5, cucullaris muscles, and viscera

spinal nerves

both sensory and motor nerves, entering and leaving the spinal cord

dorsal root of spinal nerve

sensorty nerves entering the spinal cord; in shark, also contains visceral motor neurons. (Note that in amniotes, visceral motor neurons leave vie the ventral root.)

ventral root of spinal nerve

motor nerves leaving the spinal cord

About this deck

By: Samantha Cowell
Textbook: Comparative Anatomy
Comparative Anatomy of the Vertebrates
Created: 2011-04-19
Size: 32 flashcards
Views: 23

About StudyBlue

“I have been getting MUCH better grades on all my tests for school. Flash cards, notes, and quizzes are great on here. Thanks!”
Kathy