Class Notes (839,331)
Canada (511,272)
Psychology (3,528)
PSY100H1 (1,637)

Sept 18 Lec 2.docx

6 Pages

Course Code
Michael Inzlicht

This preview shows pages 1 and half of page 2. Sign up to view the full 6 pages of the document.
Sept. 18, Lecture # 2 B64 Anatomical Directions: • You always need a point of reference (we generally use the spinal cord) • 90 degree twist in neuraxis • Proximal = closer to • Distal = far away • Lateral = towards the sides • Medial = towards the middle Planes of Section: • Horizontal/ Transverse: horizontal slices from bottom to top (slicing a hotdog bun) o Round part toward the left and hemis clearly split toward the right • Sagittal: down the nose, vertical slices from side to side (new hotdog buns) o You’re only really seeing one hemi (least amount of brain out of all of them) o Midsagittal cut = down the corpus collosum o Parasagittal cut = more towards a side • Coronal/ Frontal: regular slices of loaf bread, cutting vertical slices from front to back o You can see the round part of the brain at the top and the 2 hemis at the bottom + corpus in the middle clearly Protecting and Supplying the Nervous System: • Meninges: 3 layers, protects brain (also exist in the spinal cord!) *PNS has all these membranes except arachnoid membrane!* o Dura matter = just under the bone of skull, fairly thick, quite hard o Arachnoid membrane = more spongey, fibre-like arachnoid terabulae  Subarachnoid space = full of CSF, blood vessels course through o Pia matter = follows all the convolutions (all the gyri and sulci) of brain, not tough and rigid, similar to seram wrap, very thin delicate layer, closest to the cortex • Cerebrospinal fluid: secreted in ventricles (hollow spaces). Circulates through ventricles, subarachnoid space, and central canal of spinal cord o 2 very large lateral ventricles in each hemi rd o 3 ventricle o 4 ventricle o Ventricles all connect with cerebral canal and are filled with CSF o Avg. of 120 ml of CSF in our brain and it’s constantly being changed over o CSF produced in choroid plexus (a black, gummy structure) • Blood supply: brain receives nutrients through carotid and vertebral arteries o Brain can’t store its own glucose or energy, so it gets it from blood o 3 main cerebral arteries = anterior, middle, posterior o 3 mins of blood supply cut off = damage Organization of the Nervous System: Central • See slide for this!! • USE SUMMARY TABLES IN TEXTBOOK • Maybe go back and watch videos • Brain (“cephalon” = brain) o Hindbrain (damage often causes death bc controls vital fxns). Also called brainstem.  Includes reticular formation = sleep, arousal, temp reg, motor control  Metencephalon (pons and cerebellum)  Myelencephalon (medulla = reg of breathing, heart rate) o Midbrain (Mesencephalon)  Fairly small region of the brain  Know only 2 parts: • Colliculi o Superior = visual processing o Inferior = auditory processing o Forebrain  Telencephalon • Neocortex = o Lissencephalic = no convulutions i.e. rat o Gyrencephalic = has gyri, convultions i.e. human brain o 6 layers of cerebral cortex (outermost = 1 = closest to pia)  I: not many cells  II: most cells start here, few cell bodies, but we see axons, synaptic connections here  III: pyramidal cells, but smaller,  IV:  V: larger cells, pyramidal cells (motor activity)  VI: mixture of cell shapes, sizes, types (polymorphic in terms of the cells that exist here) • Basal ganglia = located deep within hemis. Disease of basal ganglia include Parkinson’s (progressive deterioration of dopamine-containing neurons in substantia nigra. Slow in initiating movement, jittery, tremors, rigid movement) and Huntington’s (progressive destruction of mainly the caudate and putamen)Composed of: o Globus pallidus o Putamen o Substantia nigria • Limbic System (overlap in other parts of brain) o Hippocampus: declarative memory o Amygdala: fear, aggression, memory o Hypothalamus: aggression, reg of hunger, thirst, sex, temp, circadian rhythms, hormones o Anterior Cingulate Cortex: decision making, error detection, reward, pain, empathy o Posterior Cingulate
More Less
Unlock Document

Only pages 1 and half of page 2 are available for preview. Some parts have been intentionally blurred.

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.