FACTS FILE NERVOUS SYSTEM

FACTS FILE       NERVOUS SYSTEM

1.Encephalon                            Brain

2.Meningitis                               Inflamation of meninges – viral infection or increased production of

                                                cerebrospinal fluid

3.Piamatter                               Vascularised and nutritive

4Reticular connective tissue        Cells of arachnoid membrane

5 Duramatter                             Made up of fibrous connective tissue

6 Fifth ventricle or pseudocoel     Cavity of corpus callosum

7 Cerebral cortex                       Centre of highest sensation

8 Foremen of Monro                   Connects lateral ventricle with third ventricle

9 Paracoel                                 Lateral ventricle

10 Diocoel                                 Third ventricle

11 Aqueduct of sylvius                Iter- connection between third and fourth ventricle

12 Liitle brain                             Cerebellum

13 Arbor vitae                            Branching of white matter in to grey matter in cerebellum

14 Brain stem                            Diencephalon+ mid brain + pons varolii+ medulla

15 Neurocoel                             Central canal of spinal cord

16 Craneal nerves                      12 pairs in amniotes, 10 pairs in amniotes

17 Cranial nerves of man Olfactory, optic, oculomotor, trochlear, trigeminal, abducens, facial,                                                           auditory, glossopharyngeal, vagus, spinal accessory, hypoglossal

18 Cranial nerves                       3 pairs sensory,5 pairs motor,4 pairs mixed

19 Cranial nerves                       Spinal accessory and hypoglossal absent in frog- present in man

20 Pavlov                                   Discovered reflex action

21 Sympathetic nerves system   Also called thoracolumbar outflow

22 Acetyl choline                       Secreted by preganglionic nerves

23 Sympathin                            Secreted by post ganglionic nerve

24 Para sympathetic                  Also called Craneao sacral outflow

25 Threshhold or firing level         Minimum strength to initiate action potential

26 Refractory period                   Time for restoration of nerve fibre- 0. 001 second

27 Saltatory propagation Nod to nod jumping of impulses in myelinated nerves

28 Blood Brain Barrier                Barrier between cereral blood and cerebro spinal fluid

29 Cybernetics                          Deals with neural and chemical integration of body

30 Pallium                                 Roof of Paracoel

31 Cauda equina                        Also called filum terminale- terminal part of spinal cord

32 Somaesthetic area                Also called post- central area- center for pain touch temp.

33 Eighth cranial nerve               Goes to ear

34 Fifth cranial nerve                  Goes to jaw muscle

35 Broca’s area                         Speech control center- present in frontal lobe

36 Cereellum                             Only part of brain without ventricle

37 Brachial plexus                     Last four cervical and first thoracic spinal nerves

38 Auerbach plexus                   Network of nerves formed from vagus nerve & distribute     on organs

39 Absolute refractory period       Period between two nerve impulses

40 Genu & splenium                   Anterior and posterior ends of corpus callosum

41 Parkinson’s disease              Lack of neurotransmitter dopamine

42 Pineal stalk                           Outgrowth from the roof of third ventricle

43 Resting potential                   70 mv

44 Trigeminal                             Mandibular- largest cranial nerve

45 EEG                                     Electro Encephalo Graph- used to measure brain waves

46 Vermis                                 Large median lob cerebellum in mammals

47 IQ                                        Ratio of mental age to chronological age multiplied by 100

48 Choroid plexus                      Secrete cerebro spinal fluid

49 Synaptic fatigue                    Due to more adrenaline

50 Spinal nerves of man              31 pairs- frog has 10 pairs